Fungicidal imidazole derivatives

Abstract

Silicon-containing imidazoles having broad-spectrum fungicidal activity have been discovered.

Description

RELATED APPLICATION

This application is a continuation-in-part of my copending application U.S. Ser. No. 474,872, filed Mar. 21, 1983, which is a continuation-in-part of my copending application U.S. Ser. No. 377,121, filed May 12, 1982, which is a continuation-in-part of my copending application U.S. Ser. No. 349,262, filed Feb. 16, 1982, which is a continuation-in-part of copending application U.S. Ser. No. 276,987, filed June 24, 1981, all now abandoned.

BACKGROUND OF THE INVENTION

The present invention relates to silylmethylimidazoles, and, more particularly, to silylmethylimidazoles such as (1,1'-biphenyl-4-yl)dimethyl(1H-imidazol-1-ylmethyl)silane, and to their use in controlling fungus diseases of living plants.

U.S. Pat. No. 3,692,798 discloses compounds of the formula: ##STR1## wherein R₁, R₂ and R₃ can be lower alkyl and phenyl. It is taught that the compounds are useful as antimicrobial agents. Agricultural uses are not disclosed, nor are compounds wherein R₁, R₂ or R₃ is substituted phenyl.

European Pat. No. 29,993 discloses compounds of the formula: ##STR2## wherein R can be C₁ -C₄ alkyl and Y and Z can be H or SiR₁ R₂ R₃, wherein R₁, R₂, and R₃ can be alkyl, haloalkyl, alkenyl, alkynyl, or substituted phenyl. It is taught that the compounds are useful as agricultural fungicides.

U.S. Pat. Nos. 3,256,308 and 3,337,598 disclose compounds of the formula: ##STR3## wherein R₁ can be methyl, ethyl, vinyl, or phenyl. Their use to control fungi is also taught.

Belgian Pat. No. 785,127 discloses quaternary ammonium salts such as: ##STR4## and their use as fungicides.

Research Disclosure 17,652 discloses silyl ethers of the formula: ##STR5## wherein Ar can be substituted phenyl, X can be CH or N, and R can be alkyl. It is taught that the compounds are useful as agricultural fungicides.

West German Pat. No. DE 3,000,140 discloses silyl ethers of the formula: ##STR6## wherein Ar can be substituted phenyl, X can be CH or N, and R can be phenyl or lower alkyl. It is taught that these compounds are useful as agricultural fungicides.

U.S. Pat. No. 4,248,992 discloses guanidines of the formula: ##STR7## wherein R can be H, alkyl, or alkoxy and R₁ can be H or alkyl. It is taught that these compounds are useful as antifungal agents for molded plastics and rubbers.

U.S.S.R. Pat. No. 346,306 discloses silylmethylazoles of the formula:

(R₁)_n (R₂ O)₃-n SiCH₂ Az

wherein R₁ and R₂ are alkyl groups, n is 0-3, and Az is a pyrazole, imidazole, or benzimidazole ring, optionally substituted.

U.S.S.R. Pat. No. 271,552 discloses silylethylazoles of the formula:

(R₁)_n (R₂ O)₃-n SiCH₂ CH₂ Az

wherein R₁, R₂, n, and Az are as described in the previous reference.

European Pat. No. 11,769 discloses compounds of the following formula: ##STR8## wherein R is substituted phenyl, naphthyl or tetrahydronaphthyl ring;

R₁ is a substituted phenyl or cycloalkyl ring;

R₂ is H, or together with R₁ it may form an annelated aryl or alkyl ring;

R₃ is halogen, alkyl, alkoxy or haloalkyl;

n is 0, 1, 2 or 3; and

X is CH or N,

and their use as antimicrobials.

Belgian Pat. No. 838,298 discloses compounds of the following formula: ##STR9## where A and B are C₁ -C₅ divalent alkyl groups;

R₁ is H, CN, alkyl, cycloalkyl, alkenyl, cycloalkenyl, alkynyl, optionally substituted aryl, or optionally substituted aralkyl;

R₂ is H, alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, optionally substituted aryl, or optionally substituted aralkyl;

R₃ and R₄ are H, alkyl, alkenyl, cycloalkyl, cycloalkenyl, optionally substituted aryl, or optionally substituted aralkyl;

Z is optionally substituted aryl;

n is 0 or 1; and

n' is 0 or 1,

and their use as agricultural fungicides.

SUMMARY OF THE INVENTION

This invention relates to novel compounds of Formula I and to agriculturally useful compositions of these compounds. ##STR10## wherein Q₁, Q₂ and Q₃ are independently H or CH₃ ;

R₁ is C₆ -C₁8 alkyl, C₃ -C₆ cycloalkyl, naphthyl, or ##STR11## where R₄ and R₅ are independently --H, halogen, --OCH₃, --OCF₃, --SCH₃, --SO₂ CH₃, --CF₃, phenyl, phenyl substituted with halogen and/or C₁ -C₄ alkyl and/or --CF₃, phenoxy, phenoxy substituted with halogen and/or C₁ -C₄ alkyl and/or --CF₃, C₁ -C₄ alkyl, or cyclohexyl;

with the proviso that both R₄ and R₅ may not simultaneously be H; and

R₂ and R₃ are independently C₁ -C₆ alkyl, C₃ -C₆ cycloalkyl, OR₆, or ##STR12## wherein R₄ and R₅ are as defined above except that R₄ and R₅ may simultaneously be H; and

where R₆ is H, C₁ -C₄ alkyl, or ##STR13## with the proviso that when R₂ and R₃ are both OR₆, then R₆ must be C₁ -C₄ alkyl; or

R₂ and R₃ together may be a 1,2- or 1,3- or 1,4-glycol bridge or a 1,4 unsaturated glycol bridge substituted by up to four alkyl groups R₇ -R₁0 that have a total of up to four carbon atoms ##STR14## R₁1 is H or C₁ -C₄ alkyl; and fungicidally active metal complexes or protic acid salts of said compounds.

This invention also relates to a method for controlling fungus diseases, particularly fungus diseases of living plants, by applying to the locus of infestation to be protected an effective amount of the compounds of formula I.

Preferred for their high activity and/or favorable ease of synthesis are compounds of the generic scope wherein

Q₁ =Q₂ =Q₃ =H; and R₁1 is H or CH₃.

More preferred for their higher activity and/or more favorable ease of synthesis are compounds of the preferred scope wherein

R₁ is ##STR15## and R₂ is C₁ -C₄ alkyl, phenyl, or ##STR16## and R₃ is C₁ -C₄ alkyl or OR₆, where R₆ is H, C₁ -C₄ alkyl or ##STR17##

Most preferred for their highest activity and/or most favorable ease of synthesis are compounds of the more preferred scope wherein ##STR18## where R₄ is at the para position of R₁, and R₄ is H, F, Cl, Br, or phenyl, and

R₅ is H, F, Cl, or Br; and

R₂ is ##STR19## or C₁ -C₄ alkyl; and R₃ is C₁ -C₄ alkyl or OR₆, where R₆ is H, C₁ -C₄ alkyl or ##STR20##

Specifically preferred for their excellent activity and/or most favorable ease of synthesis are:

(1,1'-Biphenyl-4-yl)dimethyl(1H-imidazol-1-ylmethyl)silane; and

(2,4-Dichlorophenyl)dimethyl(1H-imidazol-1-ylmethyl)silane.

Also embraced within the scope of this invention are novel intermediates of the formula ##STR21## wherein R₁ and R₂ are independently ##STR22## where R₄ and R₅ are independently H, halogen, or phenyl, with the proviso that R₄ and R₅ can not both be H;

R₃ is OH, OR₆, C₁ -C₄ alkyl or Cl;

R₆ is C₁ -C₄ alkyl or ##STR23## R₁1 is H or C₁ -C₄ alkyl; and X is Cl, Br or I.

A further novel intermediate within the scope of this invention is (1,1'-biphenyl-4-yl)(chloromethyl)dimethylsilane.

DETAILED DESCRIPTION OF THE INVENTION

PAC Synthesis

The compounds of this invention wherein R₁1 is H can be prepared from chloromethylsilanes and imidazole sodium salt or its methylated homologs: ##STR24## Q₁, Q₂, Q₃ =H or CH₃. Lithium and potassium imidazole salts may also be used. Bromomethylsilanes, iodomethylsilanes, or arylsulfonyloxymethylsilanes may be used instead of chloromethylsilanes. Approximately equimolar amounts of the reagents are used (except when R₃ of the starting material is Cl, in which case two equivalents of imidazole salt is required), with the imidazole salt often taken in 5-10% excess of theory. In addition, imidazole itself can be used if an acid acceptor is added. Suitable acceptors include alkali metal alkoxides such as sodium methoxide or potassium tert-butoxide, inorganic bases such as potassium carbonate or sodium hydride, and tertiary amines such as triethylamine or excess imidazole. When the acid acceptor is a good nucleophile, such as sodium methoxide, an excess should be avoided to prevent undesired side reactions. Suitable solvents include polar aprotic solvents such as dimethylformamide, dimethyl sulfoxide, or acetonitrile; ethers such as tetrahydrofuran or 1,2-dimethoxyethane; and ketones such as 2-butanone. Non-polar solvents, for example aromatic hydrocarbons such as toluene, may also be used if a suitable phase transfer catalyst such as tetrabutylammonium hydrogen sulfate is added. The reaction temperature can vary between 0° and 200°, preferably between 25° and 100°. The reaction can be conducted under elevated pressure, but it is generally preferable to operate at atmospheric pressure. The optimum temperature and reaction time will vary with the concentration and choice of reagents, and especially with the choice of solvent. Progress of the reaction can be followed by working up aliquots for nmr analysis and following the intensities of the starting material SiCH₂ Cl singlet near 2.9 and the product SiCH₂ N singlet near 3.7.

When Q₂ and Q₃ are not the same, two isomers result from this reaction: ##STR25## The product of Formula IA will generally predominate. The isomers may be separated by standard techniques such as crystallization, distillation, or chromatography.

For the case where R₃ =OR₆ in the product, one replaces the chlorines of a chloro(chloromethyl)silane in one of two ways. In one method, at least two equivalents of imidazole sodium salt are used. An intermediate containing a very reactive silicon-imidazole bond forms, and reaction with water or an alcohol gives the desired oxygenated compounds: ##STR26## Suitable solvents and reaction conditions are the same as those outlined previously for imidazole displacements. The temperature of alcoholysis is not critical, and warming to 50°-100° can be used to ensure complete reaction when R₆ =C₁ -C₄ alkyl. For R₆ =H, however, hydrolysis is best conducted near room temperature to minimize disiloxane formation, recognizing that silanol-disiloxane equilibrium is possible whenever R₆ =H; ##STR27## The position of equilibrium and the rate at which it is established with vary with the values of R₁ and R₂, solvent, temperature, and the presence or absence of acidic or basic catalysts.

In the second method, the silicon-oxygen bond is formed first, followed by imidazole displacement as described earlier: ##STR28## Reaction of the chlorosilane with R₆ OH may be conducted in almost any non-hydroxylic solvent, with ethers such as diethyl ether, 1,2-dimethoxyethane, and tetrahydrofuran or dipolar aprotic solvents such as dimethylformamide and acetonitrile being preferred. Although an acid acceptor is not required, it is preferred to add a tertiary amine such as triethylamine or pyridine. The reaction temperature may vary from 0° to 100°, and R₆ OH is often taken in excess of theory. The combination of 2 equivalents of R₆ OH, 1.1 equivalents of triethylamine, and 0.1 equivalents of imidazole in dimethylformamide at 80° for two hours has been broadly applicable. Compounds having R₆ =alkyl may be converted to silanols (R₆ =H) and/or the corresponding disiloxanes by hydrolysis, preferably catalyzed by acid or base, and more preferably catalyzed by acid. In some instances this cleavage may occur during the imidazole displacement, so that chloromethyl silyl ethers having R₆ =alkyl can give rise directly to imidazolylmethyl silanols having R₆ =H.

Extending these methods to (chloromethyl)dichlorosilanes provides dioxygenated silanes: ##STR29## After forming the silicon-oxygen bonds, it is sometimes advantageous to convert the chloromethylsilane to an iodomethylsilane with a suitable source of iodide ion before performing the triazole displacement reaction. Conversion of these dioxygenated compounds to the glycol bridge substituted silanes is accomplished by heating with equimolar amounts of the suitably substituted glycol in the presence of acid catalysts such as p-toluenesulfonic acid while R₆ OH is distilled away: ##STR30##

An alternative synthesis for alkoxy(chloromethyl)silanes involves selective replacement of one alkoxy group of a dialkoxysilane with an organometallic reagent: ##STR31## Conditions for this displacement are described below, with the added stipulation that the organometallic is preferably added to the dialkoxysilane.

The required chloromethylsilane starting materials are made from commercially available chloro(chloromethyl)dimethylsilane, chloromethyl(dichloro)methylsilane, or chloromethyltrichlorosilane: ##STR32## The Si--Cl bonds in these compounds react with organolithium, organosodium, or Grignard reagents to introduce alkyl and/or aryl groups according to literature procedures, leaving the C--Cl bond intact. For the silanes containing two or three Si--Cl bonds, stepwise replacements are possible, giving considerable flexibility to the values of R₁ -R₃. Bromosilanes, iodosilanes, or alkoxysilanes may be substituted for chlorosilanes in these reactions. Preferred solvents for these reactions include ethers such as tetrahydrofuran, 1,2-dimethoxyethane, and diethyl ether, or hydrocarbons such as hexane and toluene. The preferred temperature will vary between -80° and 40° depending on the nature of the organometallic reagent, how it was generated, and the solvent. For example, when aryllithium reagents are generated in tetrahydrofuran from aryl bromides using butyllithium, the mixture should be held below roughly -40° to avoid side reactions involving the bromobutane produced. If the organometallic solution is stable at higher temperatures, however, reactions may be run at -20° to 25° without competing reaction of the CH₂ Cl group.

Reactions of ClSi(CH₃)₂ CH₂ Cl with Grignard reagents are described by C. Eaborn and J. C. Jeffrey, J. Chem. Soc., 1954, 4266; and a recent review on synthesis of aryltrimethylsilanes from ClSi(CH₃)₃, which contains experimental procedures useful for ClSi(CH₃)₂ CH₂ Cl reactions, is that of D. Habich and F. Effenberger, Synthesis, 1979, 841. Selective introduction of one new alkyl group into Cl₂ Si(CH₃)CH₂ Cl is described by V. P. Kuznetsova and R. M. Sokolovaskaya, Zh. Obshch. Khim., 1969, 1977; Chem. Abstr., 72, 31897 p; and one aryl group may be introduced selectively as well: ##STR33## In some cases the organometallic reagent is preferably added to the dichlorosilane at low temperature with good mixing for best yields. Grignard reagents tend to be more selective than organolithiums.

Reactions of Cl₃ SiCH₂ Cl with Grignard reagents are described by A. A. Zhdanov, V. I. Pakhomov, and T. Bazhanova, Zh. Obshch. Khim., 1973, 1280; Chem. Abstr., 79, 66452m. In this case, addition of organometallic reagents to the trichlorosilane is recomended even when three identical groups are being introduced, because addition of Cl₃ SiCH₂ Cl to an organometallic reagent is not usually successful. One or two aryl groups may be introduced selectively: ##STR34## Grignard reagents are again more selective than organolithiums, and in many cases a third equivalent of Grignard reacts slowly or not at all, providing a very clean synthesis of diarylchloro(chloromethyl)silanes.

A useful modification of literature procedures, applicable when R₁ is an aryl group, has been developed in the present work. Instead of preforming an organolithium reagent and then combining it with a chlorosilane, it has been found that an aryl bromide and a chlorosilane such as ClSi(CH₃)₂ CH₂ Cl may be combined in an inert solvent such as tetrahydrofuran and treated at -80° to -40° with butyllithium. Brominelithium exchange proceeds selectively, and the resulting aryllithium reacts with the Si--Cl bond as it is formed: ##STR35## This reaction works equally well for aryl-substituted chlorosilanes such as ClSi(CH₃)(C₆ H₅)CH₂ Cl, and it can be used to introduce two aryl groups into Cl₂ Si(CH₃)CH₂ Cl. In a further extension, an aryl and an n-butyl group may be introduced in one step: ##STR36## Substitution of other alkyllithiums RLi for n-butyllithium provides a general route to Ar(CH₃)Si(R)CH₂ Cl.

The compounds of this invention wherein R₁1 is C₁ -C₄ alkyl are prepared by applying the reaction described above to R₁ R₂ R₃ SiCH(R₁1)Cl. The required 1-chloroalkylsilane intermediates can be prepared by either of two literature methods. Free-radical chlorination of alkylchlorosilanes with sulfuryl chloride is described by Y. Nagai, N. Machida, H. Kono and T. Migita, J. Org. Chem., 32, 1194 (1967). Mixtures of 1-, 2-, 3- etc. chloroalkylchlorosilanes are obtained. The 1-chloroalkyl isomer can be separated, for example by distillation, and converted to the appropriately substituted 1-chloroalkylsilane by Grignard addition as described above. This is illustrated for an alkyltrichlorosilane as follows: ##STR37##

An alternative synthesis was developed using metallation chemistry. Reaction of chloromethyltrimethylsilane with secondary butyllithium and tetramethylethylenediamine (TMEDA) forming 1-lithio-1-chloromethyltrimethylsilane, followed by treatment with methyl iodide to yield 1-chloroethyltrimethylsilane, is described by C. Burford, F. Cooke, E. Ehlinger and P. Magnus, J. Am. Chem. Soc., 99, 4536 (1977) and F. Cooke and P. Magnus, J. Chem. Soc. Chem. Comm., 513 (1977): ##STR38## A useful modification of the literature method as been developed in the present work, extending it to more complex silanes and other alkylating agents. Deprotonation of chloromethylsilanes with sec-butyllithium followed by treatment with alkyl halides has been found to give 1-chloroalkylsilanes: ##STR39##

Displacement of the 1-chloroalkylsilanes with imidazole is accomplished as described above for chloromethylsilanes; however, longer reaction times are required.

Temperatures are reported here in degrees Celsius. Abbreviations for nuclear magnetic resonance (nmr) spectra are s=singlet, d=doublet, t=triplet, q=quartet, m=multiplet; peak positions are reported as parts per million downfield from internal tetramethylsilane. Infrared (ir) peak positions are given in reciprocal centimeters (cm-1). Hexanes refers to the mixture of isomers boiling 68°-69°, and ether refers to diethyl ether.

EXAMPLE 1

PAC Preparation of (1,1'-Biphenyl-4-yl)(chloromethyl)dimethylsilane

A solution of 9.9 g (0.042 mol) of 4-bromobiphenyl in 50 ml of dry tetrahydrofuran was cooled to -78° under nitrogen and stirred while 26.5 ml (0.042 mol) of 1.6 molar n-butyllithium in hexane was added dropwise over 15 minutes. A thick slurry formed, and 35 ml of tetrahydrofuran was added to facilitate stirring. With continued cooling, 5.9 ml (6.7 g, 0.046 mol) of chloro(chloromethyl)dimethylsilane was added over 10 minutes, giving a clear solution that was allowed to warm to room temperature. Addition of 300 ml of ether, filtration to remove precipitated lithium chloride, and evaporation of the filtrate left 13.2 g of semisolid. Redissolution in ether, filtration, and evaporation of the filtrate left 11.0 g (100% crude) of the title compound as a colorless solid, m.p. 30°-40°, suitable for further reaction. Trace impurities could be removed by sublimation at 30°/0.1 mm, leaving the title compound unsublimed in 83% recovery: m.p. 37°-40°; ir (Nujol^R) 1585, 1240, 1110, 830, 810, 750, 690 cm-1 ; nmr (CDCl₃) 0.4 (6H, s), 2.9 (2H, s), 7.3-7.7 (9H, m).

EXAMPLE 2

PAC Preparation of (4-Bromophenyl)(chloromethyl)dimethylsilane

4-Bromophenylmagnesium bromide was prepared from 11.8 g (0.050 mol) of 1,4-dibromobenzene and 1.2 g (0.050 g-atom) of magnesium turnings in 75 ml of ether according to G. P. Schiemenz, Org. Syn., Coll. Vol. 5, 496 (1973). The resulting mixture was chilled in ice under a nitrogen atmosphere while a solution of 6.6 ml (7.2 g, 0.050 mol) of chloro(chloromethyl)dimethylsilane in 10 ml of ether was added dropwise. The reaction mixture was then stirred overnight at room temperature, quenched carefully with saturated aqueous ammonium chloride, and filtered. The ether phase of the filtrate was washed with brine, dried over magnesium sulfate, and evaporated to leave 9.8 g of an oil. Distillation gave 3.8 g (29%) of the title compound as a colorless liquid: bp 97° (1 mm); ir (neat) 2950, 1575, 1475, 1370, 1250, 1065, 1010, 840, 805, 720 cm-1 ; nmr (CDCl₃) 0.4 (6H, s), 2.9 (2 H, s), 7.3-7.7 (4H, m).

EXAMPLE 3

PAC Preparation of Chloromethyl(4-chlorophenyl)dimethylsilane

A solution of 9.6 g (0.050 mol) of 4-bromochlorobenzene and 6.6 ml (7.2 g, 0.050 mol) of chloro(chloromethyl)dimethylsilane in 75 ml of tetrahydrofuran was stirred at -78° under nitrogen while 31 ml (0.050 mol) of 1.6 molar n-butyllithium in hexane was added dropwise. The resulting clear solution was allowed to warm to room temperature, diluted with ether until no more lithium chloride precipitated, and filtered. Evaporation of the filtrate left 10.6 g of a light yellow liquid, which was distilled to give 6.0 g (55%) of the title compound as a colorless liquid: bp 54°-58°C (0.05 mm); ir (neat) 2910, 1560, 1470, 1370, 1250, 1080, 1010, 840, 805, 790, 740 cm-1 ; nmr (CDCl₃) 0.4 (6H, s), 2.9 (2H, s), 7.1-7.6 (4H, q).

The in situ aryllithium generation described in this example is also useful for preparing the product of Example 1. If the reaction is run at 0.5-0.7 molar in 4-bromobiphenyl and the temperature is held at -65° to -55°C during butyllithium addition, little or no solid precipitates.

EXAMPLE 4

PAC Preparation of Chloromethyl(2,4-dichlorophenyl)dimethylsilane

A solution of 17.0 g (0.075 mol) of 2,4-dichlorobromobenzene and 10.8 ml (11.8 g, 0.082 mol) of chloro(chloromethyl)dimethylsilane in 100 ml of dry tetrahydrofuran was chilled to -70° under nitrogen and stirred while 49 ml (0.079 mol) of 1.6 molar n-butyllithium in hexane was added dropwise at a rate that held the mixture below -70°. The resulting cloudy reaction mixture was allowed to warm to room temperature, poured into 400 ml of hexanes, filtered, and evaporated to leave 20.5 of yellow liquid. Distillation gave 12.6 g (66%) of the title compound as a colorless liquid: bp 83° (0.02 mm); n_D²4 1.5522; ir (neat) 1565, 1455, 1360, 1255, 1120, 1100, 1040, 825 cm-1 ; nmr (CDCl₃) 0.5 (6H, s), 3.1 (2H, s), 7.0-7.5 (3H, m).

EXAMPLE 5

PAC Preparation of Chloromethyl(2,6-dimethoxyphenyl)dimethylsilane

A solution of 25.0 g (0.181 mol) of 1,3-dimethoxybenzene in 250 ml of tetrahydrofuran was stirred at room temperature under nitrogen while 125 ml (0.200 mol) of 1.6 molar n-butyllithium in hexane was added dropwise over 30 minutes. The resulting mixture was refluxed 1.5 hour, giving an orange-brown solution that was cooled to 5° and stirred while 27 ml (29.4 g, 0.205 mol) of chloro(chloromethyl)dimethylsilane was added dropwise over 15 minutes. The resulting white suspension was allowed to warm to room temperature, stirred there 1 hour, diluted with ethyl acetate, poured into water, and extracted with ether. The organic layers were washed with brine, dried over magnesium sulfate, and distilled to give 37.0 g (84%) of the title compound as a colorless liquid: bp 98°-110° (0.1 mm); nmr (CDCl₃) 0.4 (6H, s), 3.1 (2H, s), 3.7 (6H, s), 6.3 (2 H, d), 7.1 (1H, m).

By varying the organolithium or Grignard reagent, the procedures of Examples 1-5 can be used to prepare the compounds of Table I. Closely related procedures are also known in the literature, for example the use of arylmagnesium chlorides by C. Eaborn and J. C. Jeffrey, J. Chem. Soc., 1954, 4266. For compounds where R₁ is a phenyl ring bearing a 2-halo substituent, an alternative to the in situ procedure of Example 4 is the special arylmagnesium iodide method of C. Eaborn, K. L. Jaura, and D. R. M. Walton, J. Chem. Soc., 1964, 1198.

TABLE I
______________________________________
##STR40##
R1
______________________________________
n-C12 H25  nD23 1.4510
n-C18 H37  nD22 1.4556
cyclopropyl
cyclopentyl
cyclohexyl           bp 120-130° (10 mm)
1-naphthyl           bp 112° (0.08 mm)
2-naphthyl
4-fluorophenyl       bp 59-60° (0.1 mm)
4-methoxyphenyl      bp 80° (0.05 mm)
4-phenoxyphenyl      bp 122° (0.03 mm)
4-(4-chlorophenoxy)phenyl
nD22 1.5773
4-(4-fluorophenoxy)phenyl
4-(4-trifluoromethylphenoxy)phenyl
4-(4-methylphenoxy)phenyl
4-thiomethylphenyl   bp 92-93° (0.05 mm)
4-trifluoromethylphenyl
nD23 1.4686
4-methylphenyl       bp 96° (7 mm)
4-i-propylphenyl
4-t-butylphenyl      nD23 1.5056
4-methylsulfonylphenyl
m.p. 64-68°
4-cyclohexylphenyl   nD21 1.5424
4-trifluoromethoxyphenyl
bp 55-57° (0.15 mm)
4-(4-chlorophenyl)phenyl
4-(4-bromophenyl)phenyl
4-(4-methylphenyl)phenyl
4-(4-trifluoromethylphenyl)phenyl
4-(4-fluorophenyl)phenyl
3-phenylphenyl       nD20 1.5862
3-trifluoromethylphenyl
bp 59-62° (0.3 mm)
3-chlorophenyl       bp 73° (0.15 mm)
2-trifluoromethylphenyl
nD23 1.4826
2-phenylphenyl       nD20 1.5772
2-chlorophenyl       bp 78-80° (0.3 mm)
2-methoxyphenyl      nD21 1.5164
2,3-dimethylphenyl
2,3-dimethoxyphenyl  nD22 1.5254
2,4-difluorophenyl
2-fluoro-4-chlorophenyl
2-chloro-4-phenylphenyl
2-fluoro-4-phenylphenyl
2-methyl-5-chlorophenyl
2,6-dimethylphenyl
3,4-dichlorophenyl   bp 98°  (0.6 mm)
3-methyl-4-fluorophenyl
3,5-dichlorophenyl   bp 94-95° (0.25 mm)
______________________________________

EXAMPLE 6

PAC Preparation of (1,1'-Biphenyl-4-yl)butyl(chloromethyl)methylsilane

The title compound can be prepared by the procedure of Example 1 by substituting butylchloro(chloromethyl)methylsilane for chloro(chloromethyl)dimethylsilane.

Related compounds can be prepared by the procedures of Examples 1-5, using the appropriate aryl bromide and Cl(R₂)Si(CH₃)CH₂ Cl. The required chloromethylsilane starting materials are made from R₂ MgCl or R₂ Li and Cl₂ Si(CH₃)CH₂ Cl according to Examples 14 and 15, and literature procedures such as V. P. Kuznetsova and R. M. Sokolovaskaya, Zh. Obshch. Khim., 1969, 1997.

Alternatively, both the biphenyl and butyl groups can be introduced simultaneously as follows: A solution of 23.3 g (0.10 mol) of 4-bromobiphenyl and 12.7 ml (16.4 g, 0.10 mol) of chloromethyl(dichloro)methylsilane in 150 ml of dry tetrahydrofuran was chilled under nitrogen to -70° and stirred while 125 ml (0.20 mol) of 1.6 molar n-butyllithium in hexane was added at a rate that held the mixture below -60°C The resulting thin slurry was allowed to warm to room temperature, treated cautiously with 10 ml of ethyl acetate, and poured into 300 ml of water. The organic layer was separated, the aqueous phase was washed with another 100 ml of hexanes, and the combined organic phases were washed three times with water, once with brine, dried over magnesium sulfate, and evaporated to leave 33.9 g of a viscous yellow oil. Distillation gave 9.5 g (31%) of the title compound: bp 135°-158° (0.1 mm); n_D²2 1.5743; ir (neat) 3060, 3015, 2960, 2920, 2870, 1600, 1485, 1390, 1380, 1250, 1120, 1075, 1005, 875, 810, 800, 760, 700 cm-1 ; nmr (CDCl₃): 0.4 (3H, s), 0.6-1.8 (9H, m), 2.9 (2H, s) and 7.0-7.7 (9H, m).

EXAMPLE 7

PAC Preparation of Butyl(chloromethyl)(4-chlorophenyl)methylsilane

A solution of 14.4 g (0.075 mol) of 4-bromochlorobenzene and 9.5 ml (12.3 g, 0.075 mol) of chloromethyl(dichloro)methylsilane in 150 ml of tetrahydrofuran was stirred under nitrogen and cooled in dry ice-acetone while 94 ml (0.15 mol) of 1.6 molar n-butyllithium in hexane was added dropwise at a rate that held the mixture between -65° and -55°. The resulting slurry was allowed to warm to room temperature, giving a solution that was diluted with hexanes until no more lithium chloride precipitated. Filtration, evaporation of the filtrate, dissolution of the residue in hexanes, refiltration, and evaporation left 19.8 g of a pale orange liquid. Distillation gave first 1.8 g (12%) of chloromethyl(dibutyl)methylsilane, bp 45° (0.05 mm), followed by 6.8 g (35%) of the title compound as a colorless liquid: bp 90° (0.05 mm); n_D²1 1.5246; ir (neat) 2925, 1580, 1380, 1260, 1090, 1015, 820, 740 cm -1 ; nmr (CDCl₃) 0.4 (3H, s), 0.6-1.5 (9H, m), 2.9 (2H, s), 7.0-7.4 (4H, q).

EXAMPLE 8

PAC Preparation of Chloromethyl(2,4-dichlorophenyl)methyl(phenyl)silane

A solution of 13.6 g (0.060 mol) of 2,4-dichlorobromobenzene and 12.3 g (0.060 mol) of chloro(chloromethyl)methyl(phenyl)silane (prepared as in Example 14) in 85 ml of dry tetrahydrofuran was chilled to -60° under nitrogen and stirred while 38 ml (0.060 mol) of 1.6 molar n-butyllithium in hexane was added dropwise at a rate that held the mixture below -55°. The resulting red solution was allowed to warm to room temperature, treated with 5 ml of ethyl acetate to quench any unreacted organolithium reagent, and poured into 170 ml of water. The organic layer was separated, the aqueous phase was washed with 50 ml of hexanes, and the combined organic phases were washed three times with water and once with brine, dried over magnesium sulfate, and evaporated to leave 19.0 g of bright yellow oil. Distillation gave 8.6 g (45%) of the title compound as a colorless liquid: b.p. 125°-130° (0.05 mm); n_D²1 1.5978; ir (neat) 3080, 3060, 2960, 2930, 1570, 1540, 1460, 1430, 1365, 1260, 1120, 1100, 1040, 820, 745, 735, 705 cm-1 ; nmr (CDCl₃) 0.8 (3H, s), 3.4 (2H, s), 7.2-7.9 (8H, m).

EXAMPLE 9

PAC Preparation of (1,1'-Biphenyl-4-yl)chloromethyl(4-fluorophenyl)methylsilane

A solution of 10.0 g (32.8 mmol) of (1,1'-biphenyl-4-yl)(chloromethyl)methyl(2-propoxy)silane and 3.6 ml (32.8 mmol) of 4-bromofluorobenzene in 30 ml of dry tetrahydrofuran was cooled to -60° under nitrogen and stirred while 20.5 ml (32.8 mmol) of 1.6 molar n-butyllithium in hexane was added at a rate that held the mixture below 50°. After stirring at -70° for another 30 minutes, the solution was allowed to warm to room temperature and was worked up as in Example 8. The resulting crude product was subjected to distillation at 130°-150° (0.2 mm) to remove unreacted starting material, leaving the title compound as an oil: n_D²3 1.5128; nmr (CDCl₃): 0.7 (3H, s), 3.1 (2H, s), 7.1 (2H, t), 7.2-7.8 (11H, m).

EXAMPLE 10

PAC Preparation of Chloromethylbis(4-chlorophenyl)methylsilane

A solution of 19.1 g (0.10 mol) of 4-chlorobromobenzene in 200 ml of dry tetrahydrofuran was chilled to -60° under nitrogen and stirred while 63 ml (0.10 mol) of 1.6 molar n-butyllithium in hexane was added dropwise at a rate that held the mixture below -55°. Stirring and cooling were continued while 6.3 ml (8.2 g, 0.05 mol) of chloromethyl(dichloro)methylsilane was added dropwise at a rate that held the mixture below -50°. The resulting orange solution was allowed to warm to room temperature, and workup as in Example 8 provided 16.5 g of a pale yellow oil. Kugelrohr distillation at 0.05 mm and an airbath temperature of 130°-150°C gave 9.5 g (60%) of the title compound as a colorless liquid: n_D²4 1.5913; ir (neat) 3080, 3040, 3020, 2960, 2930, 1580, 1490, 1380, 1260, 1085, 1015, 805, 790, 775, 740 cm-1 ; nmr (CDCl 3) 0.7 (3H, s), 3.1 (2H, s), 7.2-7.7 (8H, m); analysis for C₁4 H₁3 Cl₃ Si (mw 315.70):

Calculated: C, 53.26; H, 4.15; Cl, 33.69. Found: C, 53.4; H, 4.4; Cl, 34.2. C, 53.5; H, 4.4; Cl, 34.1.

EXAMPLE 11

PAC Preparation of (Chloromethyl)bis(4-fluorophenyl)methylsilane

A solution of 35 g (0.20 mol) of 4-fluorobromobenzene in 300 ml of dry tetrahydrofuran was chilled to -60° under nitrogen and stirred while 126 ml (0.20 mol) of 1.6 molar n-butyllithium in hexane was added dropwise at a rate that held the mixture below -55°. Stirring and cooling were continued while 12.6 ml (16.4 g, 0.10 mol) of chloromethyl(dichloro)methylsilane was added dropwise at a rate that held the mixture below -50°. The resulting solution was allowed to warm to room temperature, and workup as in Example 8 provided 26.4 g of a clear yellow liquid. Distillation gave 20.6 g (73%) of the title compound as a colorless liquid: bp 107°-127° (0.1 mm); n_D²2 1.5481; nmr (CDCl₃): 0.7 (3H, s), 3.2 (2H, s), 7.1 (4H, t, J=9) and 7.6 (4H, d of d, J=6 and 9). A similar sample of the title compound was crystallized from ether-hexane at -78° to give a colorless solid, m.p. 39°-40°.

Repeating this reaction using chloromethyl(diethoxy)methylsilane instead of the dichlorosilane gave the title compound in 58% yield after distillation: bp 115°-138° (0.2 mm); n_D²1 1.5464; nmr as above.

EXAMPLE 12

PAC Preparation of Chloromethyl(2-chlorophenyl)(4-chlorophenyl)methylsilane

A solution of 6.3 ml (8.2 g, 0.05 mol) of chloromethyl(dichloro)methylsilane and 8.1 g (0.05 mol) of 2-bromochlorobenzene in 75 ml of dry tetrahydrofuran was chilled to -60° under N₂ and stirred while 31 ml (0.05 mol) of 1.6 molar n-butyllithiumhexane solution was added at a rate that held the mixture below -55°. With continued cooling and stirring, 8.1 g (0.05 mol) of 4-bromochlorobenzene was added as a solid, followed by another 31 ml portion of the 1.6 molar n-butyllithium solution at a rate that held the mixture below -55°C The resulting thin slurry was allowed to warm to room temperature, treated cautiously with 10 ml of ethyl acetate, and worked up as in Example 8 to give 15.0 g of a clear yellow oil. Distillation provided 5.9 g (37%) of the title compound: bp 150°-165° (0.7 mm); n_D²0 1.5916; ir (neat) 3060, 3020, 2960, 2920, 2870, 1580, 1560, 1490, 1420, 1380, 1255, 1125, 1115, 1085, 1035, 1015, 805, 750 cm-1 ; nmr (CDCl₃) 0.8 (3H, s), 3.3 (2H, s), 7.2-7.7 (8H, m).

The compounds of Table II are made by stepwise replacement of the Si--Cl bonds of Cl₂ Si(CH₃)CH₂ Cl, according to the procedures of Examples 6-12.

TABLE II
______________________________________
##STR41##
R1       R2
______________________________________
i-C3 H7
cyclohexyl
n-C10 H21
cyclopropyl
n-C18 H37
3-methylbutyl
cyclopropyl   n-C6 H13
cyclohexyl    cyclohexyl
1-naphthyl    t-C4 H9
2-naphthyl    n-C5 H11
4-phenylphenyl
C2 H5
4-bromophenyl i-C3 H7
4-fluorophenyl
n-C4 H9
bp 90-92°
(0.1 mm)
4-phenoxyphenyl
t-C4 H9
4-t-butylphenyl
cyclopentyl
3-trifluoromethylphenyl
s-C4 H9
3-chlorophenyl
n-C5 H11
2-thiomethylphenyl
cyclobutyl
2-phenylphenyl
i-C4 H9
2,4-dichlorophenyl
n-C4 H9
bp 109-112°
(0.1 mm)
2,4-dichlorophenyl
cyclopropyl
2,3-dimethylphenyl
n-C3 H7
2-methyl-5-fluorophenyl
cyclopentyl
2,5-dimethoxyphenyl
4-methylpentyl
2,6-dimethylphenyl
1-methylbutyl
3,5-dichlorophenyl
n-C4 H9
3,5-dichlorophenyl
cyclohexyl
3-methyl-4-chlorophenyl
cyclopropyl
4-fluorophenyl
phenyl          nD22 1,5624
4-chlorophenyl
phenyl          bp 140-148°
(0.1 mm)
4-bromophenyl phenyl          bp 145-155°
(0.1 mm)
4-phenylphenyl
phenyl          bp 173-178°
(0.1 mm)
4-t-butylphenyl
phenyl
4-thiomethylphenyl
phenyl
4-phenoxyphenyl
phenyl
4-trifluoromethoxyphenyl
phenyl
4-methylsulfonylphenyl
phenyl
4-cyclohexylphenyl
phenyl
4-(4-fluorophenyl)phenyl
phenyl
3-trifluoromethylphenyl
phenyl
2-chlorophenyl
phenyl          bp 132-135°
(0.1 mm)
2-methoxyphenyl
phenyl
2-chloro-4-phenylphenyl
phenyl
2-fluoro-4-phenylphenyl
phenyl
3,5-dichlorophenyl
phenyl
2,5-dimethoxyphenyl
phenyl
2,6-dimethoxyphenyl
phenyl
4-bromophenyl 4-bromophenyl   bp 160-170°
(0.1 mm)
4-phenylphenyl
4-phenylphenyl  m.p. 115-117°
4-methylphenyl
4-methylphenyl  bp 118-122°
(0.1 mm)
4-methoxyphenyl
4-methoxyphenyl bp 166-171°
(0.1 mm)
3-trifluoromethylphenyl
3-trifluoromethylphenyl
2-methoxyphenyl
2-methoxyphenyl
2-chlorophenyl
2-chlorophenyl  bp 135-140°
(0.1 mm)
2,4-dichlorophenyl
2,4-dichlorophenyl
nD21 1.5956
3,5-dichlorophenyl
3,5-dichlorophenyl
2-chlorophenyl
4-fluorophenyl
4-phenylphenyl
4-chlorophenyl
4-phenylphenyl
2,4-dichlorophenyl
4-fluorophenyl
2,4-dichlorophenyl
4-chlorophenyl
2,4-dichlorophenyl
1-naphthyl    2,6-dimethoxyphenyl
4-phenoxyphenyl
3,4-dichlorophenyl
______________________________________

EXAMPLE 13

PAC Preparation of (1-1'-Biphenyl-1-yl)(chloromethyl)diethylsilane

The title compound can be prepared by the procedure of Example 1, using chloro(chloromethyl)diethylsilane instead of chloro(chloromethyl)dimethylsilane.

Similar compounds of Table III can be prepared by applying the procedures of Examples 1-5 to the appropriate aryl bromide and Cl(R₂)Si(R₃)CH₂ Cl. The required chloro(chloromethyl)dialkylsilanes are made from Cl₃ SiCH₂ Cl, using two equivalents of R₂ MgCl or R₂ Li when R₂ =R₃ (see, for example, A. A. Zhdanov, V. I. Pakhomov, and T. Bazhanova, Zh. Obshch. Khim., 1973, 1280), or using one equivalent of R₂ MgCl or R₂ Li followed by one equivalent of R₃ MgCl or R₃ Li when R₂ is not equal to R₃.

EXAMPLE 14

PAC Preparation of Chloromethyl[tris(4-chlorophenyl)]silane

A solution of 24.5 g (0.128 mol) of 4-bromochlorobenzene in dry tetrahydrofuran was cooled to -60° under nitrogen and stirred while 80 ml (0.128 mol) of 1.6 molar n-butyllithium in hexane was added at a rate that held the mixture below -50°. The resulting solution was stirred another 10 minutes at -60° to -70°, and then a solution of 5.2 ml (0.041 mol) chloromethyltrichlorosilane in tetrahydrofuran was added dropwise over 30 minutes. The resulting solution was stirred at -70° for 1 hour, allowed to warm to room temperature, quenched with saturated aqueous ammonium chloride, and extracted with ether. Washing the ether extracts with brine, drying over magnesium sulfate, and evaporation left a viscous oil, which was chromatographed over silica gel (hexanes elution) to give 9.1 g (53%) of the title compound as a colorless oil that solidified on standing: m.p. 89°-93°; nmr (CDCl₃) 3.4 (2H, s), 7.5 (12H, broad s).

The compounds of Table III are made by stepwise replacement of the Si--Cl bonds of Cl₃ SiCH₂ Cl, according to the procedures of Examples 13-14.

TABLE III
______________________________________
##STR42##
R1         R2      R3
______________________________________
n-C8 H17
C2 H5
cyclopentyl
n-C14 H29
cyclopropyl  1-methylbutyl
n-C18 H37
n-C6 H13
n-C6 H13
cyclohexyl    n-C3 H7
n-C3 H7
1-naphthyl    n-C4 H9
n-C4 H9
2-naphthyl    n-C4 H9
cyclobutyl
phenyl        cyclopropyl  n-C6 H13
4-phenylphenyl
n-C4 H9
n-C4 H9
4-chlorophenyl
n-C4 H9
n-C4 H9
4-fluorophenyl
n-C3 H7
n-C3 H7
4-phenoxyphenyl
n-C4 H9
cyclohexyl
4-(4-chlorophenoxy)-
n-C4 H9
n-C4 H9
phenyl
4-t-butylphenyl
s-C4 H9
i-C4 H9
3-methoxyphenyl
C2 H5
t-C4 H9
3-trifluoromethylphenyl
s-C4 H9
s-C4 H9
2-thiomethylphenyl
i-C3 H7
3-methylbutyl
2-phenylphenyl
cyclohexyl   cyclohexyl
2,4-dichlorophenyl
n-C4 H9
n-C4 H9
2,6-dimethylphenyl
t-C4 H9
t-C4 H9
3,5-dichlorophenyl
cyclopentyl  cyclopentyl
3-methyl-4-chlorophenyl
s-C4 H9
s-C4 H9
cyclohexyl    phenyl       phenyl
n-C18 H37
phenyl       phenyl
n-C4 H9
4-chlorophenyl
4-chlorophenyl
n-C12 H25
4-chlorophenyl
4-chlorophenyl
1-naphthyl    4-fluorophenyl
4-fluorophenyl
cyclopropyl   phenyl       4-t-butylphenyl
n-C4 H9
phenyl       4-phenylphenyl
t-C4 H9
phenyl       2,4-dichlorophenyl
n-C3 H7
phenyl       3-trifluoromethyl-
phenyl
i-C4 H9
phenyl       3,5-dichlorophenyl
cyclopentyl   phenyl       2,6-dimethoxyphenyl
n-C14 H29
4-chlorophenyl
2-fluorophenyl
n-C4 H9
4-fluorophenyl
4-phenylphenyl
4-fluorophenyl
4-fluorophenyl
4-fluorophenyl
m.p. 57-60°
4-phenylphenyl
4-phenylphenyl
4-phenylphenyl
2,4-dichlorophenyl
2,4-dichloro-
2,4-dichlorophenyl
phenyl
phenyl        4-fluorophenyl
4-fluorophenyl
phenyl        4-chlorophenyl
4-chlorophenyl
phenyl        4-phenylphenyl
4-phenylphenyl
phenyl        2,4-dichloro-
2,4-dichlorophenyl
phenyl
2-naphthyl    4-methylthio-
4-methylthiophenyl
phenyl
4-chlorophenyl
2-methoxyphenyl
2-methoxyphenyl
4-chlorophenyl
3-chlorophenyl
3-chlorophenyl
phenyl        2-chlorophenyl
4-fluorophenyl
phenyl        4-chlorophenyl
4-phenylphenyl
1-naphthyl    4-bromophenyl
3-methylphenyl
4-phenoxyphenyl
3,5-dimethyl-
3,4-dichlorophenyl
phenyl
______________________________________

EXAMPLE 15

PAC Preparation of Chloro(chloromethyl)methyl(phenyl)silane

A solution of 12.7 ml (16.4 g, 0.10 mol) of chloromethyl(dichloro)methylsilane in 200 ml of ether was chilled to -70° under nitrogen and stirred vigorously while a mixture of 55 ml (0.10 mol) of 1.8 molar phenyllithium in 30:70 ether-cyclohexane and 55 ml of ether was added dropwise at a rate that kept the mixture below -70°. The resulting slurry was stirred and warmed to room temperature, then allowed to stand overnight. Filtration and evaporation of the filtrate left 20.4 g of a golden oil, which was distilled to give 14.6 g (71%) of the title compound as a colorless liquid: bp 71°-74° (0.6 mm); n_D²3 1.5337; ir (neat) 3080, 3060, 2980, 2930, 1590, 1430, 1260, 1120, 820, 790, 740, 700 cm-1 ; nmr (CDCl₃) 0.8 (3H, s), 3.1 (2H, s), 7.3-7.6 (3H, m), 7.6-7.8 (2H, m).

EXAMPLE 16

PAC Preparation of Chloro(chloromethyl)[bis(4-fluorophenyl)]silane

A suspension of 7.0 g (0.288 mol) of magnesium turnings in 50 ml of ether was stirred under nitrogen while a solution of 50.2 g (0.287 mol) of 4-bromofluorobenzene in 200 ml of ether was added dropwise at a rate that maintained gentle reflux. After another 2 hours at reflux, the mixture was chilled in ice and a solution of 12.0 ml (0.096 mol) of chloromethyltrichlorosilane in 30 ml of ether was added dropwise. The resulting mixture was refluxed for 4 hours, chilled in ice, treated with a solution of 7.5 ml of isopropanol in 20 ml of ether, stirred 5 minutes, and filtered. The filtrate was evaporated to leave a viscous oil that was stirred with hexanes to give a slurry. Filtration under nitrogen and evaporation of the filtrate left a mobile oil that was distilled to give 17.6 g (61%) of the title compound: bp 100°-140° (0.1 mm); nmr (CDCl₃) 3.3 (2H, s), 7.1 (4H, t), 7.7 (4H, d of d).

EXAMPLE 17

PAC Preparation of (1,1'-Biphenyl-4-yl)chloro(chloromethyl)methylsilane

The title compound can be prepared by reaction of equimolar quantities of 4-bromobiphenyl, chloromethyldichloro(methyl)silane, and n-butyllithium according to the procedure of Example 3.

The compounds of Table IV can be prepared using the procedures of Examples 15-17.

TABLE IV
______________________________________
##STR43##
R1          R2
______________________________________
C2 H5
CH3
t-C4 H9
CH3
n-C4 H9
CH3
n-C12 H25
C2 H5
n-C18 H37
n-C6 H13
cyclopropyl    CH3
cyclohexyl     CH3
1-naphthyl     i-C3 H7
2-naphthyl     cyclobutyl
phenyl         t-C4 H9
4-phenylphenyl n-C4 H9
4-phenylphenyl n-C6 H13
4-chlorophenyl n-C4 H9
4-chlorophenyl CH3
4-fluorophenyl n-C6 H13
4-phenoxyphenyl
cyclohexyl
4-t-butylphenyl
n-C3 H7
4-trifluoromethoxyphenyl
CH3
4-(4-fluorophenyl)phenyl
CH3
3-trifluoromethylphenyl
t-C4 H9
2-thiomethylphenyl
cyclopentyl
2,4-dichlorophenyl
CH3
2,4-dichlorophenyl
n-C4 H9
2-chloro-4-phenylphenyl
CH3
2,3-dimethylphenyl
cyclopropyl
2-methyl-5-fluorophenyl
s-C4 H9
2,6-dimethoxyphenyl
1,1-dimethylpropyl
3-methyl-4-chlorophenyl
C2 H5
3,5-dichlorophenyl
n-C5 H11
n-C12 H25
2,4-dichlorophenyl
n-C18 H37
phenyl
1-naphthyl     phenyl
phenyl         phenyl
4-fluorophenyl phenyl
4-chlorophenyl phenyl
4-phenylphenyl phenyl
4-t-butylphenyl
phenyl
3-fluorophenyl phenyl
2-methoxyphenyl
phenyl
2-chlorophenyl phenyl
2,4-dichlorophenyl
phenyl
3,5-dichlorophenyl
phenyl
4-chlorophenyl 4-chlorophenyl  bp 110-130°
(0.1 mm)
4-phenylphenyl 4-phenylphenyl
2,4-dichlorophenyl
2,4-dichlorophenyl
3-trifluoromethylphenyl
3-trifluoromethylphenyl
2-methoxyphenyl
2-methoxyphenyl
2-chlorophenyl 4-fluorophenyl
3-trifluoromethylphenyl
4-t-butylphenyl
2-fluoro-4-chlorophenyl
4-bromophenyl
2,3-dimethylphenyl
4-methylthiophenyl
2,6-dimethoxyphenyl
4-methoxyphenyl
3,4-dichlorophenyl
4-methylphenyl
______________________________________

EXAMPLE 18

PAC Preparation of Chloromethyl(methoxy)methyl(phenyl)silane

A solution of 1.6 ml (1.3 g, 0.040 mol) of methanol and 3.0 ml (2.2 g, 0.022 mol) of triethylamine in 100 ml of ether was stirred while a solution of 4.1 g (0.020 mol) of chloro(chloromethyl)methyl(phenyl)silane in 10 ml of ether was added dropwise. The resulting slurry was refluxed for 2 hours, cooled, washed with water, 0.1N aqueous HCl, saturated aqueous NaHCO₃, water, and brine, dried over magnesium sulfate, and evaporated to leave 3.2 g of a pale yellow liquid. Distillation provided 1.7 g (42%) of the title compound as a colorless liquid: bp 46°-49° (0.05 mm); n_D²2 1.5207; nmr (CDCl₃): 0.5 (3H, s), 3.0 (2H, s), 3.5 (3H, s) and 7.3-7.8 (5H, m).

EXAMPLE 19

PAC Preparation of Chloromethyl(1,1-dimethylethoxy)methyl(phenyl)silane

A mixture of 15.4 g (0.075 mol) of chloro(chloromethyl)methyl(phenyl)silane, 14 ml (11.1 g, 0.15 mol) of t-butanol, 11.5 ml (8.3 g, 0.082 g) of triethylamine, and 0.5 g (0.008 mol) of imidazole in 60 ml of dimethylformamide was stirred at 80° for 2 hours. The resulting slurry was cooled, poured into 200 ml of water, and extracted with ether. The ether extracts were washed three times with water, followed by 0.1N aqueous HCl, saturated aqueous NaHCO₃, and brine, dried over magnesium sulfate, and evaporated to leave 14.0 g of a pale orange oil. Distillation provided 11.9 g (65%) of the title compound: bp 78°-82° (0.2 mm); n_D²1 1.5010; ir (neat) 3080, 3060, 2990, 2940, 1600, 1435, 1395, 1370, 1260, 1245, 1195, 1125, 1060, 1030, 815, 790, 740, 725, 705, 650 cm-1 ; nmr (CDCl₃): 0.5 (3H, s), 1.3 (9H, s), 2.9 (2H, s) and 7.3-7.8 (5H, m).

EXAMPLE 20

PAC Preparation of (1,1'-Biphenyl-4-yl)chloromethyl(methyl)(2-propoxy)silane

A solution of 73.3 g (0.315 mol) of 4-bromobiphenyl in 300 ml of tetrahydrofuran was added dropwise to a stirred suspension of 7.64 g (0.315 mol) of magnesium in 100 ml of tetrahydrofuran at a rate that maintained gentle reflux. The resulting clear solution was stirred at room temperature for 1 hour and then cooled in ice, and a solution of 40 ml (0.315 mol) of chloromethyl(dichloro)methylsilane in 100 ml of tetrahydrofuran was added rapidly. The resulting solution was stirred at room temperature for 20 hours, treated with 50 ml of isopropanol, and cooled in ice again. A solution of 48 ml (0.344 mol) of triethylamine in tetrahydrofuran was then added at a rate that held the mixture below 25°. Stirring at room temperature for 90 minutes gave a slurry. Filtration, evaporation of the filtrate, trituration with hexanes, and a second filtration removed residual amine hydrochloride. Evaporation of the hexanes solution gave 92 g (96%) of the title compound as a pale yellow oil that solidified on standing; m.p. 35°-38°; nmr (CDCl₃) 0.5 (3H, s), 1.2 (6H, d), 3.0 (2H, s), 4.2 (1H, septet), 7.3-7.8 (9H, m).

EXAMPLE 21

PAC Preparation of Chloromethyl[bis(4-fluorophenyl)](2-propoxy)silane

A mixture of 23.2 g (0.955 mol) of magnesium and 50 mg of iodine in 200 ml of ether was stirred while a solution of 167 g (0.954 mol) of 4-bromofluorobenzene in 600 ml of ether was added at a rate that maintained gentle reflux. After another 2 hours at reflux, the solution was cooled in ice and stirred while a solution of 40 ml (0.32 mol) of chloromethyltrichlorosilane in ether was added dropwise over 40 minutes. The resulting mixture was stirred at room temperature for 17 hours, chilled in ice, treated with 24 ml of isopropanol, stirred another 10 minutes, and filtered. The filtrate was concentrated to a gummy solid, hexanes was added, the resulting slurry was filtered, and the hexanes filtrate was evaporated to leave an oil. Analysis by nmr showed the presence of unreacted chlorosilane, so the oil was dissolved in hexanes containing 30 ml of isopropanol, and the solution was chilled in ice and treated with a solution of 42 ml (0.30 mol) of triethylamine in hexanes. The resulting slurry was stirred at room temperature for 3 hours and filtered, and the filtrate was evaporated to leave an oil. Distillation provided 44.8 g (43%) of the title compound as a colorless liquid: bp 120°-140° (0.1 mm); n_D²2 1.5211; nmr (CDCl₃) 1.2 (6H, d), 3.2 (2H, s), 4.1 (1H, septet), 7.1 (4H, t), 7.7 (4H, d of d).

EXAMPLE 22

PAC Preparation of Chloromethyl(ethoxy)methyl(phenyl)silane

A solution of 18.2 ml (18.2 g, 0.10 mol) of chloromethyl(diethoxy)methylsilane in 200 ml of dry ether was stirred vigorously under N₂ and chilled while 56 ml (0.10 mol) of 1.8 molar phenyllithium in 70:30 cyclohexane-ether was added at a rate that held the mixture below -50°. The resulting slurry was allowed to warm to room temperature, treated cautiously with 10 ml of ethyl acetate, washed with water and brine, dried over magnesium sulfate, and evaporated to leave 16.8 g of a golden yellow liquid. Distillation provided 9.5 g (44%) of the title compound as a colorless liquid: bp 80°-84° (0.1 mm); n_D²0 1.5144; nmr (CDCl₃) 0.5 (3H, s), 1.2 (3H, t, J=7), 3.0 (2H, s), 3.8 (2H, q, J=7), 7.2-7.8 (5H, m).

The compounds of Table V can be prepared using the procedures of Examples 18-22.

TABLE V
______________________________________
##STR44##
R1         R2      R6
______________________________________
C2 H5
CH3     CH3
t-C4 H9
CH3     t-C4 H9
n-C4 H9
CH3     C2 H5
n-C12 H25
C2 H5
CH3
n-C18 H37
n-C6 H13
CH3
cyclopropyl   CH3     s-C4 H9
cyclohexyl    CH3     CH3
1-naphthyl    i-C3 H7
i-C3 H7
2-naphthyl    cyclobutyl   n-C3 H7
phenyl        CH3     H
phenyl        CH3     i-C3 H7
bp 72-76°
(0.1 mm)
phenyl        t-C4 H9
H
4-phenylphenyl
n-C4 H9
CH3
4-phenylphenyl
t-C4 H9
H
4-phenylphenyl
CH3     C2 H5
4-phenylphenyl
CH3     n-C4 H9
4-chlorophenyl
n-C4 H9
n-C4 H9
4-chlorophenyl
CH3     CH3
4-chlorophenyl
CH3     C2 H5
4-fluorophenyl
n-C6 H13
n-C3 H7
4-fluorophenyl
CH3     C2 H 5
4-fluorophenyl
CH3     i-C3 H7
nD22 1.4827
4-phenoxyphenyl
cyclohexyl   i-C4 H9
4-t-butylphenyl
n-C3 H7
s-C4 H9
3-trifluoromethylphenyl
t-C4 H9
H
2-methylthiophenyl
cyclopentyl  C2 H5
2,4-dichlorophenyl
CH3     CH3
2,4-dichlorophenyl
CH3     C2 H5
2,4-dichlorophenyl
CH3     t-C4 H9
2,4-dichlorophenyl
n-C4 H9
C2 H5
2,3-dimethylphenyl
cyclopropyl  i-C3 H7
2-methyl-5-fluorophenyl
s-C4 H9
n-C3 H7
2,6-dimethoxyphenyl
1,1-dimethyl-
H
propyl
3-methyl-4-chlorophenyl
C2 H5
CH3
3,5-dichlorophenyl
n-C5 H11
C2 H5
n-C12 H25
2,4-dichloro-
t-C4 H9
phenyl
n-C18 H37
phenyl       CH3
1-naphthyl    phenyl       C2 H5
phenyl        phenyl       t-C4 H9
4-fluorophenyl
phenyl       CH3
4-chlorophenyl
phenyl       n-C3 H7
4-phenylphenyl
phenyl       C2 H5
4-phenylphenyl
phenyl       s-C4 H9
4-t-butylphenyl
phenyl       s-C4 H9
3-fluorophenyl
phenyl       C2 H5
2-methoxyphenyl
phenyl       H
2-chlorophenyl
phenyl       CH3
2,4-dichlorophenyl
phenyl       i-C3 H7
3,5-dichlorophenyl
phenyl       n-C3 H7
4-fluorophenyl
4-fluorophenyl
t-C4 H9
bp 110-111°
(0.1 mm)
4-fluorophenyl
4-fluorophenyl
C2 H5
4-chlorophenyl
4-chlorophenyl
CH3
4-chlorophenyl
C2 H5
4-chlorophenyl
4-chlorophenyl
i-C3 H7
nD22 1.5650
4-phenylphenyl
4-phenylphenyl
CH3
2,4-dichlorophenyl
2,4-dichloro-
C2 H5
phenyl
3-trifluoromethylphenyl
3-trifluoro- i-C4 H9
methylphenyl
2-methoxyphenyl
2-methoxyphenyl
H
2-chlorophenyl
4-fluorophenyl
H
3-trifluoromethylphenyl
4-t-butylphenyl
n-C4 H9
2-fluoro-4-chlorophenyl
4-bromophenyl
i-C3 H7
2,3-dimethylphenyl
4-methylthio-
C2 H5
phenyl
2,6-dimethoxyphenyl
4-methoxyphenyl
H
3,4-dichlorophenyl
4-methylphenyl
i-C4 H9
______________________________________

EXAMPLE 22A

PAC Preparation of 1-Chloroethyltrichlorosilane and 2-Chloroethyltrichlorosilane

A mixture of 50 ml (0.38 mol) of ethyltrichlorosilane, 36.5 ml (0.45 mol) of sulfuryl chloride, and 0.62 g (3.8 mmol) of 2,2'-azobis(2-methylpropionitrile) was heated at reflux for three hours, and the contents of the reaction pot were then distilled. The fraction boiling between 130° and 155° analyzed as 29% 1-chloroethyltrichlorosilane and 71% 2-chloroethyltrichlorosilane; yield 52.48 g (70%): nmr (CDCl₃) 1.7 (d, J=7 Hz, 1-chloro), 2.1 (t, J=9 Hz, 2-chloro), 3.6-3.9 (m). Distillation of the product mixture through a 60-cm Vigreux column gave a fraction bp 141°-143° that analyzed as 61% 1-chloroethyltrichlorosilane and 39% 2-chloroethyltrichlorosilane. This could be used as is for conversion to compounds of this invention.

EXAMPLE 22B

PAC Preparation of bis(4-Fluorophenyl)-1-chloroethyl(chloro)silane and bis(4-Fluorophenyl)-2-chloroethyl(chloro)silane

A mixture of 15.62 g (0.64 mol) of magnesium metal, 450 ml of tetrahydrofuran and 0.5 ml of ethylene bromide was stirred at room temperature while a solution of 67 ml (0.61 mol) of 4-fluorobromobenzene in 450 ml tetrahydrofuran was added at a rate to induce and maintain reflux. The resulting mixture was refluxed one more hour and cooled in an ice-bath, 57.65 g (0.29 mol) of a 61/39 1-chloroethyltrichlorosilane/2-chloroethyltrichlorosilane mixture in 50 ml of tetrahydrofuran was added dropwise, and the mixture was refluxed for three hours, cooled, filtered, evaporated, triturated with hexanes, filtered, evaporated, and distilled, providing 38.6 g (42%) of the title compounds as a 1 to 1 mixture: bp 140°-152° (0.5 mm); nmr (CDCl₃) 1.6 (d, J=7 Hz, 1-chloro), 2.0 (t, J=7 Hz, 2-chloro), 3.6-4.0 (m), 6.8-7.2 (m) and 7.4-7.8 (m).

EXAMPLE 22C

PAC Preparation of bis(4-Fluorophenyl)-1-chloroethyl(methyl)silane and bis(4-Fluorophenyl)-2-chloroethyl(methyl)silane

A solution of 20 g (63 mmol) of a 1:1 mixture of bis(4-fluorophenyl)-1-chloroethyl(chloro)silane and bis(4-fluorophenyl)-2-chloroethyl(chloro)silane in 100 ml of tetrahydrofuran was treated dropwise with 25 ml (71 mmol) of 2.85 molar methyl magnesium bromide in tetrahydrofuran. The mixture was refluxed two hours, cooled, and diluted with saturated aqueous ammonium chloride and water. The aqueous phase was separated and extracted with ether, and the combined organic phases were washed with water and brine, dried over sodium sulfate, and evaporated to give 17.7 g (95%) of the title compounds as a 1:1 mixture: nmr (CDCl₃) 0.6 (s), 0.7 (s), 1.6 (d, J=7 Hz, 1-chloro), 1.8 (t, J=7 Hz, 2-chloro), 3.5-4.0 (m), 6.9-7.3 (m) and 7.4-7.8 (m).

EXAMPLE 22D

PAC Preparation of (1,1'-Biphenyl-4-yl)dimethyl-1-chloroethylsilane

A solution of 4.0 g (15.3 mmol) of (1,1'-biphenyl-4-yl)chloromethyldimethylsilane in 20 ml of tetrahydrofuran was cooled to -78°, and 12.5 ml (16.8 mmol) of 1.35 molar sec-butyllithium in hexane was slowly dripped in followed by addition of 2.42 ml (16.1 mmol) of tetramethylethylenediamine. After stirring for one hour at -78°, the solution was warmed to -55° and 1.43 ml (22.9 mmol) of methyl iodide in 5 ml of tetrahydrofuran was added dropwise. The mixture was stirred another 30 minutes at -50°, warmed to room temperature, poured into saturated aqueous ammonium chloride, and extracted with ether. The ether extracts were washed with water and brine, dried over magnesium sulfate, and evaporated to give 3.33 g (65%) of the title compound contaminated by about 18% of an impurity: nmr (CDCl₃) 0.3 (s, 2.7H, impurity), 0.4 (6H, s), 1.5 (3H, d, J=7 Hz), 3.5 (1H, q, J=7 Hz) and 7.3-7.7 (m, 13H).

The compounds in Table Va were made according to the procedure of Examples 22A-22D.

TABLE Va
______________________________________
##STR45##
R1        R2     R3
R11
______________________________________
4-fluorophenyl
4-fluorophenyl
CH3 C2 H5
oil
4-fluorophenyl
4-fluorophenyl
CH3 n-C3 H7
4-fluorophenyl
4-fluorophenyl
CH3 i-C3 H7
4-fluorophenyl
4-fluorophenyl
CH3 n-C4 H9
4-fluorophenyl
4-fluorophenyl
CH3 s-C4 H9
4-fluorophenyl
4-fluorophenyl
CH3 i-C4 H9
2,4-dichlorophenyl
4-chlorophenyl
CH3 CH3
4-phenylphenyl
CH3    CH3 C2 H5
4-phenylphenyl
CH3    CH3 n-C3 H7
oil
4-phenylphenyl
CH3    CH3 i-C3 H7
oil
4-phenylphenyl
CH3    CH3 n-C4 H9
______________________________________

EXAMPLE 23

PAC Preparation of (1,1'-Biphenyl-4-yl)dimethyl(1H-imidazol-1-ylmethyl)silane

A mixture of 2.6 g (0.010 mol) of (1,1'-biphenyl-4-yl)chloromethyldimethylsilane and 1.1 g (0.012 mol) of imidazole sodium salt in 5 ml of dimethylformamide was warmed to 80°-90° for 2 hours, cooled, diluted with water, and extracted with ether. The ether solution was washed with water and brine, dried over magnesium sulfate, and evaporated to leave 2.0 g of a viscous, pale yellow oil. Trituration of a small sample with hexanes gave a solid. The bulk of the crude product was then taken up in a hot mixture of 20 ml of hexanes and 3 ml of ethyl acetate, the solution was cooled slowly, and seed crystals were added when cloudiness was observed. The resulting crystals were collected and dried to give 0.84 g (29%) of the title compound as colorless flakes: m.p. 51°-53°; ir (Nujol^R) 1235, 1215, 1105, 1065, 900, 830, 785, 750, 730, 685 cm-1 ; nmr (CDCl₃) 0.4 (6 H, s), 3.7 (2H, s), 6.7 (1H, broad s), 7.0 (1H, broad s), 7.1-7.8 (10H, m); analysis for C₁8 H₂0 N₂ Si (mw 292.45):

Calculated C, 73.92; H, 6.89; N, 9.58; Found C, 73.4; H, 7.0; N, 9.4; C, 73.7; H, 7.0; N, 9.4.

EXAMPLE 24

PAC Preparation of (4-Chlorophenyl)dimethyl(1H-imidazol-1-ylmethyl)silane

A mixture of 2.2 g (0.010 mol) of chloromethyl(4-chlorophenyl)dimethylsilane and 1.1 g (0.012 mol) of imidazole sodium salt in 5 ml of dimethylformamide was stirred at 80°-90° for 2 hours, cooled, diluted with water, and extracted with ether. The ether solution was washed with water and brine, dried over magnesium sulfate, and evaporated to leave 2.0 g (81%) of the title compound as a yellow liquid: n_D²0 1.5472; ir (neat) 1560, 1495, 1480, 1375, 1250, 1105, 1080, 905, 830, 810, 740 cm-1 ; nmr (CDCl₃) 0.3 (6H, s), 3.6 (2H, s), 6.6 (1H, broad s), 6.9 (1H, broad s), 7.1 (1H, broad s), 7.3 (4H, s).

EXAMPLE 25

PAC Preparation of (2,4-Dichlorophenyl)dimethyl(1H-imidazol-1-ylmethyl)silane

A mixture of 5.1 g (0.020 mol) of chloromethyl(2,4-dichlorophenyl)dimethylsilane and 2.0 g (0.022 mol) of imidazole sodium salt in 10 ml of dry dimethylformamide was stirred at 80°-90° for 2 hours and worked up as in Example 23 to give 3.9 g (69%) of the title compound as a brown oil: n_D²3 1.5637; ir (neat) 1560, 1500, 1450, 1355, 1250, 1105, 1095, 1075, 1025, 840, 780, 735 cm-1 ; nmr (CDCl₃) 0.4 (6H, s), 3.9 (2H, s), 6.7 (1H, broad s), 7.0 (1H, broad s) 7.2-7.5 (4H, m).

The hydrochloride salt of the title compound may be prepared as follows. A 5.0 g sample (0.017 mol) of (2,4-dichlorophenyl)dimethyl(1H-imidazol-1-ylmethyl)silane is dissolved in 100 ml of toluene, and the solution is stirred while HCl gas is introduced. When no precipitate forms, gas introduction is stopped and the colorless solid is collected by filtration, washed with toluene and petroleum ether, and air-dried to give the hydrochloride salt of the title compound. Acid salts of other imidazoles of this invention can be prepared similarly.

By applying the procedures of Example 23-25 to appropriate chloromethylsilanes, the compounds of Table VI can be prepared.

TABLE VI
__________________________________________________________________________
##STR46##
R1          R2     R3
__________________________________________________________________________
n-C12 H25
CH3    CH3    nD23 1.4585
n-C14 H29
CH3    CH3
n-C18 H37
CH3    CH3    nD21 1.4639
cyclohexyl       CH3    CH3    nD22 1.4999
1-naphthyl       CH3    CH3    nD23 1.6188
2-naphthyl       CH3    CH3
4-bromophenyl    CH3    CH3    nD20 1.5741
4-fluorophenyl   CH3    CH3    nD23 1.5314
4-methoxyphenyl  CH3    CH3    nD25 1.5485
4-phenoxyphenyl  CH3    CH3    nD22 1.5833
4-(4-chlorophenoxy)phenyl
CH3    CH3    nD22 1.5564
4-(4-fluorophenoxy)phenyl
CH3    CH3
4-(4-trifluoromethylphenoxy)phenyl
CH3    CH3
4-(4-methylphenoxy)phenyl
CH3    CH3
4-thiomethylphenyl
CH3    CH3    nD23 1.5855
4-methylsulfonylphenyl
CH3    CH3    nD21 1.5552
4-trifluoromethylphenyl
CH3    CH3    nD22 1.4867
4-methylphenyl   CH3    CH3    nD21 1.5482
4-i-propylphenyl CH3    CH3
4-t-butylphenyl  CH3    CH3    nD23 1.5229
4-cyclohexylphenyl
CH3    CH3    nD2 1.5085
4-trifluoromethoxyphenyl
CH3    CH3    nD22 1.4888
4-(4-chlorophenyl)phenyl
CH3    CH3
4-(4-methylphenyl)phenyl
CH3    CH3
4-(4-trifluoromethylphenyl)phenyl
CH3    CH3
4-(4-fluorophenyl)phenyl
CH3    CH3
4-(4-bromophenyl)phenyl
CH3    CH3    nD22 1.5745
3-phenylphenyl   CH3    CH3    nD21 1.6002
3-trifluoromethylphenyl
CH3    CH3    nD20 1.4927
3-chlorophenyl   CH3    CH3    nD22 1.5560
2-trifluoromethylphenyl
CH3    CH3    nD23 1.5056
2-phenylphenyl   CH3    CH3    nD22 1.5996
2-chlorophenyl   CH3    CH3    nD22 1.5382
2-methoxyphenyl  CH3    CH3    nD22 1.5344
2,3-dimethylphenyl
CH3    CH3
2,3-dimethoxyphenyl
CH3    CH3    nD22 1.5350
2,4-difluorophenyl
CH3    CH3
2-fluoro-4-chlorophenyl
CH3    CH3
2-chloro-4-fluorophenyl
CH3    CH3
2-chloro-4-phenylphenyl
CH3    CH3
2-fluoro-4-phenylphenyl
CH3    CH3
2-methyl-5-chlorophenyl
CH3    CH3
2,6-dimethoxyphenyl
CH3    CH3    nD22 1.5348
2,6-dimethylphenyl
CH3    CH3
3,4-dichlorophenyl
CH3    CH3    nD22 1.5673
3-methyl-4-fluorophenyl
CH3    CH3
3,5-dichlorophenyl
CH3    CH3    nD22 1.5461
i-C3 H7
cyclohexyl  CH3
n-C10 H21
cyclopropyl CH3
n-C12 H25
n-C3 H7
CH3
n-C14 H29
i-C3 H7
CH3
n-C18 H37
3-methylbutyl
CH3
cyclopropyl      n-C6 H13
CH3
cyclohexyl       cyclohexyl  CH3
1-naphthyl       n-C4 H9
CH3
1-naphthyl       t-C4 H9
CH3
2-naphthyl       n-C5 H11
CH3
phenyl           n-C6 H13
CH3
4-phenylphenyl   C2 H5
CH3
4-phenylphenyl   n-C4 H9
CH3    nD22 1.5880
4-bromophenyl    i-C3 H7
CH3
4-chlorophenyl   n-C4 H9
CH3    nD21 1.5415
4-fluorophenyl   n-C4 H9
CH3    nD22 1.5161
4-phenoxyphenyl  t-C4 H9
CH3
4-i-propylphenyl cyclopropyl CH3
4-t-butylphenyl  i-C4 H9
CH3
3-phenylphenyl   i-C4 H9
CH3
3-trifluoromethylphenyl
s-C4 H9
CH3
3-chlorophenyl   n-C5 H11
CH3
2-methoxyphenyl  t-C4 H9
CH3
2-thiomethylphenyl
cyclobutyl  CH3
2-phenylphenyl   i-C4 H9
CH3
2,4-dichlorophenyl
n-C4 H9
CH3    nD21 1.5588
2,4-dichlorophenyl
cyclopropyl CH3
2,3-dimethylphenyl
n-C3 H7
CH3
2-methyl-5-fluorophenyl
cyclopentyl CH3
2,5-dimethoxyphenyl
4-methylpentyl
CH3
2,6-dimethylphenyl
1-methylbutyl
CH3
3,4-dichlorophenyl
n-C5 H11
CH3
3,5-dichlorophenyl
n-C4 H9
CH3
3,5-dichlorophenyl
cyclohexyl  CH3
2,4-dichlorophenyl
2,4-dichlorophenyl
CH3    nD22 1.6019
3,5-dichlorophenyl
3,5-dichlorophenyl
CH3
2-chlorophenyl   4-chlorophenyl
CH3    nD20 1.6044
2-chlorophenyl   4-fluorophenyl
CH3
4-phenylphenyl   4-chlorophenyl
CH3
4-phenylphenyl   4-fluorophenyl
CH3    nD22 1.6181
4-phenylphenyl   2,4-dichlorophenyl
CH3
4-fluorophenyl   2,4-dichlorophenyl
CH3
4-chlorophenyl   2,4-dichlorophenyl
CH3
1-naphthyl       2,6-dimethoxyphenyl
CH3
4-phenoxyphenyl  3,4-dichlorophenyl
CH3
n-C8 H17
C2 H5
cyclopentyl
n-C14 H29
cyclopropyl 1-methylbutyl
n-C18 H37
n-C6 H13
n-C6 H13
cyclohexyl       n-C3 H7
n-C3 H7
1-naphthyl       n-C4 H9
n-C4 H9
2-naphthyl       n-C4 H9
cyclobutyl
phenyl           cyclopropyl n-C6 H13
4-phenylphenyl   C2 H5
C2 H5
4-phenylphenyl   n-C4 H9
n-C4 H9
4-phenylphenyl   n-C6 H13
n-C6 H13
4-phenylphenyl   cyclohexyl  cyclohexyl
4-chlorophenyl   n-C4 H9
n-C4 H9
4-fluorophenyl   n-C3 H7
n-C3 H7
4-phenoxyphenyl  n-C4 H9
cyclohexyl
4-(4-chlorophenoxy)phenyl
n-C4 H9
n-C4 H9
4-t-butylphenyl  s-C4 H9
i-C4 H9
3-methoxyphenyl  C2 H5
t-C4 H9
3-trifluoromethylphenyl
s-C4 H9
s-C4 H9
2-thiomethylphenyl
i-C3 H7
3-methylbutyl
2-phenylphenyl   cyclohexyl  cyclohexyl
3-methyl-4-chlorophenyl
cyclopropyl CH3
4-fluorophenyl   phenyl      CH3    nD19 1.5810
4-chlorophenyl   phenyl      CH3    nD21 1.6000
4-bromophenyl    phenyl      CH3    nD22 1.6115
4-phenylphenyl   phenyl      CH3    nD21 1.6378
4-t-butylphenyl  phenyl      CH3
4-thiomethylphenyl
phenyl      CH3
4-phenoxyphenyl  phenyl      CH3
4-trifluoromethoxyphenyl
phenyl      CH3
4-methylsulfonylphenyl
phenyl      CH3
4-cyclohexylphenyl
phenyl      CH3
4-(4-fluorophenyl)phenyl
phenyl      CH3
3-trifluoromethylphenyl
phenyl      CH3
2-chlorophenyl   phenyl      CH3    nD22 1.6058
2-methoxyphenyl  phenyl      CH3
2,4-dichlorophenyl
phenyl      CH3    nD22 1.6150
2-chloro-4-phenylphenyl
phenyl      CH3
2-fluoro-4-phenylphenyl
phenyl      CH3
3,5-dichlorophenyl
phenyl      CH3
2,5-dimethoxyphenyl
phenyl      CH3
2,6-dimethoxyphenyl
phenyl      CH3
4-fluorophenyl   4-fluorophenyl
CH3    nD22 1.5569
4-chlorophenyl   4-chlorophenyl
CH3    nD 1.5820
4-bromophenyl    4-bromophenyl
CH3    nD21 1.6305
4-phenylphenyl   4-phenylphenyl
CH3    m.p. 44-53°
4-methoxyphenyl  4-methoxyphenyl
CH3    nD21 1.5947
3-trifluoromethylphenyl
3-trifluoromethylphenyl
CH3
2-chlorophenyl   2-chlorophenyl
CH3    nD20 1.5999
2-methoxyphenyl  2-methoxyphenyl
CH3
2,4-dichlorophenyl
n-C4 H9
n-C4 H9
2,6-dimethylphenyl
t-C4 H9
t-C4 H9
3,5-dichlorophenyl
cyclopentyl cyclopentyl
3-methyl-4-chlorophenyl
s-C6 H9
s-C4 H9
2-methyl-5-fluorophenyl
n-C4 H9
i-C4 H9
cyclohexyl       phenyl      phenyl
n-C18 H37
phenyl      phenyl
n-C4 H9
4-chlorophenyl
4-chlorophenyl
n-C12 H25
4-chlorophenyl
4-chlorophenyl
1-naphthyl       4-fluorophenyl
4-fluorophenyl
cyclopropyl      phenyl      4-t-butylphenyl
n-C4 H9
phenyl      4-phenylphenyl
t-C4 H9
phenyl      2,4-dichlorophenyl
n-C3 H7
phenyl      3-trifluoromethylphenyl
i-C4 H9
phenyl      3,5-dichlorophenyl
cyclopentyl      phenyl      2,6-dimethoxyphenyl
n-C14 H29
4-chlorophenyl
2-fluorophenyl
n-C4 H9
4-fluorophenyl
4-phenylphenyl
4-chlorophenyl   4-chlorophenyl
4-chlorophenyl
m.p. 149-151°
4-fluorophenyl   4-fluorophenyl
4-fluorophenyl
m.p. 85-88°
4-phenylphenyl   4-phenylphenyl
4-phenylphenyl
2,4-dichlorophenyl
2,4-dichlorophenyl
2,4-dichlorophenyl
phenyl           4-fluorophenyl
4-fluorophenyl
phenyl           4-chlorophenyl
4-chlorophenyl
phenyl           4-phenylphenyl
4-phenylphenyl
phenyl           2,4-dichlorophenyl
2,4-dichlorophenyl
2-naphthyl       4-methylthiophenyl
4-methylthiophenyl
4-chlorophenyl   2-methoxyphenyl
2-methoxyphenyl
4-chlorophenyl   3-chlorophenyl
3-chlorophenyl
phenyl           2-chlorophenyl
4-fluorophenyl
phenyl           4-chlorophenyl
4-phenylphenyl
1-naphthyl       4-bromophenyl
3-methylphenyl
4-phenoxyphenyl  3,5-dimethylphenyl
3,4-dichlorophenyl
__________________________________________________________________________

EXAMPLE 26

PAC Preparation of (1,1'-Biphenyl-4-yl)dimethyl(2-methyl-1H-imidazol-1-ylmethyl)silane

The title compound is prepared by applying the procedure of Example 23 to (1,1'-biphenyl-4-yl)chloromethyldimethylsilane and the sodium salt of 2-methylimidazole.

Related compounds may be made in this way using salts of 2,4-dimethylimidazole, 4,5-dimethylimidazole, and 2,4,5-trimethylimidazole.

The procedure of Example 26 may be used to prepare the compounds of Table VII.

TABLE VII
______________________________________
##STR47##
R1      R2     R3
Q1
Q2
Q3
______________________________________
n-C18 H37
CH3    CH3 H    CH3
CH3
cyclohexyl CH3    CH3 H    CH3
CH3
1-naphthyl CH3    CH3 CH3
H    H
4-phenylphenyl
CH3    CH3 CH3
H    H
4-(4-fluoro-
CH3    CH3 CH3
H    H
phenyl)phenyl
4-phenoxyphenyl
CH3    CH3 CH3
CH3
CH3
3-trifluoromethyl-
CH3    CH3 H    CH3
CH3
phenyl -2-methoxyphenyl
CH3    CH3 CH3
H    H
2,4-dichloro-
CH3    CH3 CH3
CH3
CH3
phenyl
2-chloro-4-phenyl-
CH3    CH3 H    CH3
CH3
phenyl
4-phenylphenyl
n-C4 H9
CH3 H    CH3
CH3
2,4-dichloro-
n-C6 H13
CH3 CH3
H    H
phenyl
4-(4-chloro-
cyclohexyl  CH3 CH3
H    H
phenoxy)phenyl
4-fluorophenyl
phenyl      CH3 CH3
H    H
4-fluorophenyl
phenyl      CH3 CH3
CH3
CH3
4-chlorophenyl
phenyl      CH3 H    CH3
CH3
4-fluorophenyl
4-fluorophenyl
CH3 CH3
H    H
4-fluorophenyl
4-fluorophenyl
CH3 H    CH3
CH3
4-chlorophenyl
4-chlorophenyl
CH3 CH3
CH3
CH3
4-chlorophenyl
4-chlorophenyl
CH3 CH3
H    H
2-chlorophenyl
4-chlorophenyl
CH3 CH3
CH3
CH3
2,4-dichloro-
2,4-dichloro-
CH3 CH3
H    H
phenyl     phenyl
n-C18 H37
n-C6 H13
n-C6 H13
H    CH3
CH3
1-naphthyl n-C4 H9
n-C4 H9
CH3
CH3
CH3
______________________________________

EXAMPLE 26A

PAC Preparation of bis(4-Fluorophenyl)methyl[1-(1H-imidazol-1-yl)ethyl]silane

A mixture of 1.50 g (31 mmol) of 50% sodium hydride, 2.11 g (31 mmol) of imidazole and 20 ml of dimethylformamide was stirred at 50° for one hour. A solution of 7.1 g (23.9 mmol) of a 1:1 mixture of bis(4-fluorophenyl)methyl-1-chloroethylsilane and bis(4-fluorophenyl)methyl-2-chloroethylsilane in 10 ml of dimethylformamide was added, and stirring at 50° was continued for 48 hours. The mixture was then cooled, diluted with water, and extracted with ether. The ether phases were washed with water and brine, dried over magnesium sulfate, and evaporated to leave a viscous oil. Chromatography on silica gel with dichloromethane followed by 2% methanol in dichloromethane provided 1.42 g (18%) of the title compound as a viscous oil: nmr (CDCl₃) 0.7 (3H, s), 1.5 (3H, d, J=8 Hz), 4.2 (1H, q, J=8 Hz), 6.6-6.8 (1 H, broad s) and 6.9-7.7 (10H, m).

The compounds in Table VIIa were made according to the procedure of Example 26A.

TABLE VIIa
______________________________________
##STR48##
R1        R2      R3
R11
______________________________________
4-fluorophenyl 4-fluorophenyl
CH3
C2 H5
4-fluorophenyl 4-fluorophenyl
CH3
n-C3 H7
4-fluorophenyl 4-fluorophenyl
CH3
i-C3 H7
4-fluorophenyl 4-fluorophenyl
CH3
n-C4 H9
4-fluorophenyl 4-fluorophenyl
CH3
s-C4 H9
4-fluorophenyl 4-fluorophenyl
CH3
i-C4 H9
2,4-dichlorophenyl
4-chlorophenyl
CH3
CH3
4-phenylphenyl CH3     CH3
C2 H5
4-phenylphenyl CH3     CH3
n-C3 H7
4-phenylphenyl CH3     CH3
i-C3 H7
4-phenylphenyl CH3     CH3
n-C4 H9
______________________________________

EXAMPLE 27

PAC Preparation of the 1:1 complex of (1,1'-Biphenyl-4-yl)dimethyl(1H-imidazol-1-ylmethyl)silane and Cuprous Chloride

A mixture of 0.50 g (0.0017 mol) of (1,1'-biphenyl-4-yl)dimethyl(1H-imidazol-1-ylmethyl)silane and 0.22 g (0.0017 mol) of cuprous chloride in 15 ml of tetrahydrofuran was refluxed under N₂ for 15 minutes, and the resulting deep green solution was evaporated to leave the title complex as a dark green solid: m.p. 72°-80° (decomp.); ir (Nujol^R) 1590, 1515, 1250, 1110, 840, 820, 750, 695, 650 cm-1.

By applying the procedure of Example 27, any of the compounds of Tables VI, VII, VIII, IX, XI or XII can be converted to metal complexes or salts.

EXAMPLE 28

PAC Preparation of (1,1-'Biphenyl-4-yl)(1H-imidazol-1-ylmethyl)(methoxy)methylsilane

A mixture of (1,1'-biphenyl-4-yl)chloro(chloromethyl)methylsilane and two equivalents of imidazole sodium salt in dimethylformamide is warmed to 80°-90°C for 2 hours. Ten equivalents of methanol is then added, and the mixture is held at 70° for 1 hour, cooled, diluted with water, and quickly extracted with ether. Washing the ether solution with water and brine, drying over magnesium sulfate, and evaporation leaves the title compound.

Related compounds can be made in the same way, using the appropriate chlorosilane and alcohol; for R₆ =OH, water is used instead of an alcohol, and hydrolysis is conducted at 20°-25° instead of 70°.

EXAMPLE 29

PAC Preparation of (1,1-Dimethylethoxy)(1H-imidazol-1-ylmethyl)methyl(phenyl)silane

A mixture of 3.6 g (0.015 mol) of chloromethyl(1,1-dimethylethoxy)methyl(phenyl)silane and 1.3 g (0.015 mol) of imidazole sodium salt in 10 ml of dimethylformamide was stirred at 50° for 3 hours, allowed to stand at room temperature for 72 hours, poured into water, and extracted with ether. The ether extracts were washed three times with water and once with brine, dried over magnesium sulfate, and evaporated to leave 3.8 g of an oil. Impurities were removed by Kugelrohr distillation at 90° (airbath)/0.05 mm to leave 2.9 g (71%) of the title compound as a pale yellow oil: n_D²0 15291; ir (neat) 3105, 3070, 3045, 2970, 1590, 1500, 1425, 1360, 1250, 1235, 1185, 1110, 1055, 1020, 900, 805, 740, 700, 660 cm-1 ; nmr (CDCl₃): 0.6 (3H, s), 1.3 (9H, s), 3.6 (2H, s), 6.8 (1H, s), 7.0 (1H, s) and 7.3-7.7 (6H, m).

EXAMPLE 30

PAC Preparation of [bis(4-chlorophenyl)]hydroxy(1H-imidazol-1-ylmethyl)silane

A mixture of 5.5 g (15.3 mmol) of chloromethyl[bis(4-chlorophenyl](2-propoxy)silane and 1.5 g (17 mmol) of imidazole sodium salt in dimethylformamide was warmed to 80° to 90° for 2 hours, cooled, diluted with ethyl acetate, washed three times with water and once with brine, dried over magnesium sulfate, and evaporated to leave a viscous oil. Trituration with ether gave 1.0 g (19%) of the title compound as a colorless solid: m.p. 131°-133°; nmr (CD₃ SOCD₃) 4.1 (2H, s), 6.8 (1H, s), 6.9 (1H, s), 7.4 (4H, d), 7.6 (5H, d).

The compounds of Tables VIII and IX can be made using the procedures of Examples 27-30.

TABLE VIII
______________________________________
##STR49##
R1         R2      R6
______________________________________
C2 H5
CH3     CH3
t-C4 H9
CH3     t-C4 H9
n-C4 H9
CH3     C2 H5
n-C12 H25
C2 H5
CH3
n-C18 H37
n-C6 H13
CH3
cyclopropyl   CH3     s-C4 H9
cyclohexyl    CH3     CH3
1-naphthyl    i-C3 H7
i-C3 H7
2-naphthyl    cyclobutyl   n-C3 H7
phenyl        CH3     H
phenyl        CH3     CH3
phenyl        CH3     C2 H5
phenyl        CH3     i-C3 H7
nD20 1.5352
phenyl        t-C4 H9
H
4-phenylphenyl
n-C4 H9
CH3
4-phenylphenyl
t-C4 H9
H
4-phenylphenyl
CH3     C2 H5
4-phenylphenyl
CH3     n-C4 H9
4-chlorophenyl
n-C4 H9
n-C4 H9
4-chlorophenyl
CH3     CH3
4-chlorophenyl
CH3     C 2 H5
4-fluorophenyl
n-C6 H13
n-C3 H7
4-fluorophenyl
CH3     C2 H5
4-phenoxyphenyl
cyclohexyl   i-C4 H9
4-t-butylphenyl
n-C3 H7
s-C4 H9
3-trifluoromethylphenyl
t-C4 H9
H
2-methylthiophenyl
cyclopentyl  C2 H5
2,4-dichlorophenyl
CH3     CH3
2,4-dichlorophenyl
CH3     C2 H5
2,4-dichlorophenyl
CH3     t-C4 H9
2,4-dichlorophenyl
n-C4 H9
C2 H5
2,3-dimethylphenyl
cyclopropyl  i-C3 H7
2-methyl-5-fluorophenyl
s-C4 H9
n-C3 H7
2,6-dimethoxyphenyl
1,1-dimethyl-
H
propyl
3-methyl-4-chlorophenyl
C2 H5
CH3
3,5-dichlorophenyl
n-C5 H11
C2 H5
n-C12 H25
2,4-dichloro-
t-C4 H9
phenyl
n-C18 H37
phenyl       CH3
1-naphthyl    phenyl       C2 H5
phenyl        phenyl       t-C4 H9
4-fluorophenyl
phenyl       CH3
4-chlorophenyl
phenyl       n-C3 H7
4-phenylphenyl
phenyl       C2 H5
4-phenylphenyl
phenyl       s-C4 H9
4-t-butylphenyl
phenyl       s-C4 H9
3-fluorophenyl
phenyl       C2 H5
2-methoxyphenyl
phenyl       H
2-chlorophenyl
phenyl       CH3
2,4-dichlorophenyl
phenyl       i-C3 H7
3,5-dichlorophenyl
phenyl       n-C3 H7
4-fluorophenyl
4-fluorophenyl
t-C4 H9
nD22 1.4396
4-fluorophenyl
4-fluorophenyl
C2 H5
4-fluorophenyl
4-fluorophenyl
H       m.p.
114-116°
4-chlorophenyl
4-chlorophenyl
CH3
4-chlorophenyl
4-chlorophenyl
C2 H5
4-phenylphenyl
4-phenylphenyl
CH3
2,4-dichlorophenyl
2,4-dichlorophenyl
C2 H5
3-trifluoromethylphenyl
3-trifluoro- i-C4 H9
methylphenyl
2-methoxyphenyl
2-methoxyphenyl
H
2-chlorophenyl
4-fluorophenyl
H
3-trifluoromethylphenyl
4-t-butylphenyl
n-C4 H9
2-fluoro-4-chlorophenyl
4-bromophenyl
i-C3 H7
2,3-dimethylphenyl
4-methylthio-
C2 H5
phenyl
2,6-dimethoxyphenyl
4-methoxyphenyl
H
3,4-dichlorophenyl
4-methylphenyl
i-C4 H9
______________________________________

TABLE IX
______________________________________
##STR50##
R1       R2     R6
Q1
Q2
Q3
______________________________________
C2 H5
CH3    CH3
CH3
CH3
CH3
cyclohexyl  CH3    i-C3 H7
H    CH3
CH3
n-C18 H37
n-C6 H13
t-C4 H9
CH3
H    H
1-naphthyl  CH3    i-C3 H7
CH3
H    H
phenyl      CH3    t-C4 H9
H    CH3
H
phenyl      CH3    t-C4 H9
H    H    CH3
phenyl      CH3    t-C4 H9
CH3
CH3
CH3
phenyl      CH3    s-C4 H9
H    CH3
CH3
phenyl      CH3    i-C4 H9
CH3
H    H
4-phenylphenyl
n-C4 H9
t-C4 H9
CH3
CH3
CH3
4-phenylphenyl
CH3    t-C4 H9
CH3
H    H
4-phenylphenyl
CH3    t-C4 H9
CH3
CH3
CH3
4-chlorophenyl
CH3    t-C4 H9
CH3
H    H
4-chlorophenyl
CH3    t-C4 H9
H    CH3
CH3
4-fluorophenyl
CH3    t-C4 H9
H    CH3
H
4-fluorophenyl
CH3    t-C4 H9
H    H    CH3
phenyl      phenyl      C2 H5
CH3
CH3
CH3
phenyl      phenyl      n-C3 H7
CH3
CH3
CH3
4-fluorophenyl
phenyl      i-C3 H7
H    CH3
CH3
4-fluorophenyl
phenyl      t-C4 H9
CH3
H    H
4-chlorophenyl
phenyl      i-C3 H7
CH3
H    H
2,4-dichlorophenyl
phenyl      H       CH3
H    H
4-fluorophenyl
4-fluorophenyl
t-C4 H9
CH3
H    H
4-fluorophenyl
4-fluorophenyl
t-C4 H9
H    CH3
CH3
4-fluorophenyl
4-fluorophenyl
t-C4 H9
CH3
CH3
CH3
2-methoxyphenyl
2-methoxy-  C2 H5
CH3
H    H
phenyl
3-methylphenyl
3-methylphenyl
i-C4 H9
CH3
H    H
______________________________________

EXAMPLE 31

PAC Preparation of Chloromethyl(dichloro)phenylsilane

A solution of 25.1 ml (36.8 g, 0.200 mol) of chloromethyltrichlorosilane in 400 ml dry tetrahydrofuran was cooled to -78° under nitrogen and stirred vigorously while 48.0 ml (0.100 mol) of 2.1 molar phenyllithium was slowly dripped in over 1 hour. After stirring another 30 minutes at -78° the solution was allowed to warm to room temperature and evaporated to about 200 ml. Addition of 500 ml ether, filtration to remove precipitated lithium chloride, and evaporation of the filtrate left 25.0 g of liquid. Distillation gave 6.5 g (29%) of the title compound as a colorless liquid: bp 62°-82° (0.15 mm); nmr (CDCl₃): δ 3.3 (s, 2) and 7.1-7.9 (m, 5).

EXAMPLE 32

PAC Preparation of Chloromethyl(diethoxy)phenylsilane

A solution of 1.0 g (0.0044 mol) of chloromethyl(dichloro)phenylsilane in 8 ml of absolute ethanol was cooled to 0° under nitrogen and stirred while 0.61 ml (0.445 g, 0.0044 mol) of triethylamine was slowly added, giving a slurry that was allowed to warm to room temperature. Addition of 50 ml of ether, filtration to remove precipitated triethylamine/hydrochloride, and evaporation of the filtrate left a residue which was filtered through a short silica gel column (95% petroleum ether:ethyl acetate as the eluent) to give 0.80 (73%) of the title compound as a colorless oil: nmr (CDCl₃): δ 1.25 (t, 6, J=6 Hz), 3.0 (s, 2), 3.9 (q, 4, J=6 Hz) and 7.2-7.9 (m, 5).

EXAMPLE 33

PAC Preparation of Chloromethyl(phenyl)bis(2-propoxy)silane

A solution of 2.0 g (0.009 mol) of chloromethyl(dichloro)phenylsilane and 5 ml of 2-propanol in 15 ml of dimethylformamide was stirred under N₂ while 2.5 ml (1.9 g, 0.018 mol) of triethylamine was added dropwise. The resulting slurry was warmed to 80° for 2 hours, cooled, diluted with water, and extracted with ether. The ether extracts were washed with water and brine, dried over magnesium sulfate, and evaporated to leave 2.2 g of liquid. Column chromatography over silica gel, eluting with petroleum ether, provided 1.4 g (58%) of the title compound as a colorless liquid: n_D²2 1.4741; nmr (CDCl₃) 1.2 (12H, d, J=6), 3.0 (2H, s), 4.3 (2H, septet, J=6), 7.3-7.8 (5H, m).

EXAMPLE 34

PAC Preparation of (1,1'-Biphenyl-4-yl)chloromethyl(diethoxy)silane

A mixture of 6.3 g (0.257 mol) of magnesium turnings and about 0.2 g of iodine in 30 ml of tetrahydrofuran was stirred under nitrogen while 25 ml of a solution of 60.0 g (0.257 mol) of 4-bromobiphenyl in 75 ml of tetrahydrofuran was added dropwise. When the iodine color disappeared, another 150 ml of tetrahydrofuran was added to the reaction followed by the dropwise addition of the remaining 4-bromobiphenyl solution at a rate that maintained a gentle reflux. The resulting solution was allowed to cool to room temperature and then added to a stirred solution of 35.5 ml (51.9 g, 0.282 mol) of chloromethyltrichlorosilane in 100 ml of tetrahydrofuran which had been cooled to -70° under nitrogen. The resulting solution was allowed to warm to room temperature and then cooled with an ice bath while 125 ml of ethyl alcohol was added followed by the dropwise addition of 84 ml (60.6 g, 0.600 mol) of triethylamine. The resulting slurry was stirred while warming to room temperature, allowed to stand overnight, diluted with water, and extracted with ether. The ether solution was washed with brine, dried over magnesium sulfate, evaporated, and distilled to provide 37.6 g (46%) of the title compound as a clear liquid: b.p. 165°-185° (0.05 mm); n_D²2 1.5593; ir (neat) 2950, 1605, 1490, 1450, 1395, 1170 cm-1 ; nmr (CDCl₃) 1.25 (6H, t, J=7), 2.95 (2H, s), 3.9 (4H, q, J=7) and 7.3-7.9 (9H, m).

The compounds of Table X can be made using the procedures of Examples 31-34.

It is sometimes advantageous to convert a chloromethylsilane to the corresponding iodomethylsilane prior to reaction with an imidazole. This procedure is illustrated by Example 35.

EXAMPLE 35

PAC Preparation of Diethoxy(iodomethyl)phenylsilane

A mixture of 12.8 g (0.052 mol) of chloromethyl(diethoxy)phenylsilane, 9.4 g (0.062 mol) of sodium iodide and 0.21 g (0.52 mol) of tricaprylylmethylammonium chloride (Aliquat® 336) in 10 ml of ethyl alcohol was refluxed for 12 hours, cooled, filtered, and evaporated. The filtrate was diluted with water and extracted with ether. The ether solution was washed with brine, dried over magnesium sulfate, evaporated, and distilled to provide 8.7 g (50%) of the title compound as a clear liquid: b.p. 86°-100° (0.15 mm); n_D¹9 1.5204; ir (neat) 2980, 1590, 1480, 1430, 1390, 1290, 1165 cm-1 ; nmr (CDCl₃) 1.25 (6H, t, J=7) and 7.3-7.9 (5H, m).

Any of the compounds of Table X may be converted to iodomethylsilanes using this procedure. Further examples include:

(1,1'-Biphenyl-4-yl)diethoxy(iodomethyl)silane: b.p. 190° (0.1 mm), n_D²1 1.5861;

(4-Chlorophenyl)diethoxy(iodomethyl)silane: b.p. 90°-105° (0.05 mm), n_D²1 1.5378; and

Diethoxy(4-fluorophenyl)iodomethylsilane: b.p. 85°-87° (0.075 mm), n_D²1 1.5169.

TABLE X
______________________________________
##STR51##
R1            R6
______________________________________
C2 H5    t-C4 H9
n-C4 H9  C2 H5
n-C18 H37
CH3
cyclohexyl         n-C3 H7
1-naphthyl         i-C4 H9
phenyl             CH3
phenyl             n-C3 H7
phenyl             i-C3 H7
phenyl             t-C4 H9
4-phenylphenyl     n-C4 H9
4-phenoxyphenyl    C2 H5
4-fluorophenyl     CH3
4-fluorophenyl     C2 H5
nD22 1.4768
4-chlorophenyl     C2 H5
nD22 1.4979
4-chlorophenyl     i-C3 H7
3-trifluoromethylphenyl
s-C4 H9
2-methoxyphenyl    n-C3 H7
2,3-dimethylphenyl i-C4 H9
2,4-dichlorophenyl CH3
2,4-dichlorophenyl C2 H5
2-methoxy-5-fluorophenyl
i-C3 H7
2,6-dimethoxyphenyl
CH3
3,4-dichlorophenyl C2 H5
3,5-dichlorophenyl n-C4 H9
______________________________________

EXAMPLE 36

PAC Preparation of (1H-Imidazol-1-ylmethyl)phenylbis(2-propoxy)silane

The title compound can be made by applying the procedure of Example 25 to chloromethyl(phenyl)bis(2-propoxy)silane: n_D²2 1.4971; nmr (CDCl₃) 1.2 (12H, d, J=6), 3.6 (2H, s), 4.2 (2H, septet, J=6), 6.8-7.6 (8H, m).

EXAMPLE 37

PAC Preparation of 4,6-Dimethyl-2-(1H-imidazol-1-ylmethyl)-2-phenyl-2-sila-1,3-dioxane

Equimolar amounts of (1H-imidazol-1-ylmethyl)phenylbis(2-propoxy)silane and 2,4-pentanediol are combined with 5 mol percent of p-toluenesulfonic acid monohydrate, and the mixture is warmed to 100°-160° at atmospheric pressure until no further 2-propanol distils. The undistilled residue contains the title compound, which may be further purified by vacuum distillation.

The compounds of Tables XI and XII can be made using the procedures of Examples 36-37.

TABLE XI
______________________________________
##STR52##
R1         R6 Q1
Q2
Q3
______________________________________
C2 H5
t-C4 H9
H      H    H
n-C4 H9
C2 H5
CH3
H    H
n-C18 H37
CH3
H      CH3
CH3
cyclohexyl    n-C3 H7
CH3
CH3
CH3
1-naphthyl    i-C4 H9
H      H    H
phenyl        CH3
CH3
CH3
CH3
phenyl        n-C3 H7
CH3
H    H
phenyl        i-C3 H7
H      CH3
CH3
phenyl        t-C4 H9
H      H    H
4-phenylphenyl
C2 H5
H      H    H
4-phenylphenyl
n-C4 H9
CH3
CH3
CH3
4-phenoxyphenyl
C2 H5
CH3
H    H
4-fluorophenyl
CH3
CH3
H    H
4-fluorophenyl
C2 H5
H      H    H    nD22 1.5209
4-chlorophenyl
C2 H5
H      H    H
4-chlorophenyl
i-C3 H7
H      H    H
3-trifluoromethylphenyl
s-C4 H9
CH3
CH3
CH3
2-methyloxyphenyl
n-C3 H7
CH3
H    H
2,3-dimethylphenyl
i-C4 H9
H      CH3
CH3
2,4-dichlorophenyl
CH3
H      H    H
2,4-dichlorophenyl
C2 H5
H      H    H
2-methoxy-5-  i-C3 H7
CH3
H    H
fluorophenyl
2,6-dimethoxyphenyl
CH3
H      H    H
3,4-dichlorophenyl
C2 H5
H      H    H
3,5-dichlorophenyl
n-C4 H9
CH3
CH3
CH3
______________________________________

TABLE XII
__________________________________________________________________________
##STR53##
R1      R6         Q1
Q2
Q3
__________________________________________________________________________
C2 H5
CH2 CH2
H  H  H
n-C4 H9
##STR54##      CH3
H  H
n-C18 H37
CH2 CH2 CH2
H  CH3
CH3
cyclohexyl
##STR55##      CH3
CH3
CH3
1-naphthyl CH2 CH2
H  H  H
phenyl     CH2 CH2
H  H  H
phenyl
##STR56##      H  H  H
phenyl
##STR57##      H  H  H
phenyl     C(CH3)2 C(CH3)2
H  H  H
4-phenylphenyl
CH2 CH2
H  H  H
4-phenylphenyl
##STR58##      H  H  H
4-phenylphenyl
##STR59##      H  H  H
4-fluorophenyl
CH2 CH2
H  H  H
4-fluorophenyl
##STR60##      H  H  H
4-fluorophenyl
##STR61##      H  H  H  bp 115-120° (0.15 mm)
4-chlorophenyl
##STR62##      H  H  H
4-chlorophenyl
C(CH3)2 C(CH3)2
H  H  H
3-trifluoromethylphenyl
##STR63##      CH3
CH3
CH3
2-methoxyphenyl
##STR64##      CH3
H  H
2,3-dimethylphenyl
CH2 CH2
H  CH3
CH 3
2,4-dichlorophenyl
##STR65##      H  H  H
2,4-dichlorophenyl
##STR66##      H  H  H
2-methoxy-5-fluorophenyl
##STR67##      CH3
H  H
2,6-dimethoxyphenyl
CH2 CH2
H  H  H
3,4-dichlorophenyl
##STR68##      H  H  H
3,5-dichlorophenyl
##STR69##      CH3
CH3
CH3
C2 H5
CH2 CHCHCH2
H  H  H
n-C18 H37
##STR70##      H  CH3
CH3
phenyl     CH2 CHCHCH2
H  H  H
phenyl       C(CH3)2 CHCHC(CH3)2
H  H  H
phenyl
##STR71##      H  H  H
phenyl       C(CH3)2 CH2 CH2 C(CH3)2
H  H  H
4-phenylphenyl
CH2 CHCHCH2
H  H  H
4-phenylphenyl
##STR72##      H  H  H
4-fluorophenyl
CH2CHCHCH2
H  H  H
4-chlorophenyl
CH2 CH2 CH2 CH2
H  H  H
4-phenoxyphenyl
##STR73##      CH3
H  H
3-trifluoromethylphenyl
##STR74##      CH3
CH3
CH3
2-methoxyphenyl
##STR75##      CH3
H  H
__________________________________________________________________________

Formulations

Useful formulations of the compounds of Formula I can be prepared in conventional ways. They include dusts, granules, pellets, solutions, emulsions, wettable powders, emulsifiable concentrates and the like. Many of these may be applied directly. Sprayable formulations can be extended in suitable media and used to spray volumes of from a few pints to several hundred gallons per acre. High strength compositions are primarily used as intermediates for further formulations. The formulations, broadly, contain about 1% to 99% by weight of active ingredient(s) and at least one of (a) about 0.1% to 20% surfactant(s) and (b) about 5% to 99% solid or liquid inert diluent(s). More specifically, they will contain these ingredients in the following approximate proportions:

______________________________________
Active  Percent by Weight
Ingredient
Diluent(s)
Surfactant(s)
______________________________________
Wettable Powders
20-90      0-74     1-10
Oil Suspensions,
5-50     40-95     0-15
Emulsions, So1utions,
(including Emulsifiable
Concentrates)
Aqueous Suspensions
10-50     40-84     1-20
Dusts          1-25     70-99     0-5
Granules and Pellets
1-95      5-99     0-15
High Strength 90-99      0-10     0-2
Compositions
______________________________________

Lower or higher levels of active ingredient can, of course, be present depending on the intended use and the physical properties of the compound. Higher ratios of surfactant to active ingredient are sometimes desirable, and are achieved by incorporation into the formulation or by tank mixing.

Typical solid diluents are described in Watkins, et al., "Handbook of Insecticide Dust Diluents and Carriers", 2nd Ed., Dorland Books, Caldwell, N.J. The more absorptive diluents are preferred for the wettable powders and the denser ones for dusts. Typical liquid diluents and solvents are described in Marsden, "Solvents Guide," 2nd Ed., Interscience, New York, 1950. Solubility under 0.1% is preferred for suspension concentrates; solution concentrates are preferably stable against phase separation at 0°C "McCutcheon's Detergents and Emulsifiers Annual", MC Publishing Corp., Ridgewood, N.J., as well as Sisely and Wood, "Encyclopedia of Surface Active Agents", Chemical Publishing Co., Inc., New York, 1964, list surfactants and recommended uses. All formulations can contain minor amounts of additives to reduce foam, caking, corrosion, microbiological growth, etc.

The methods of making such compositions are well known. Solutions are prepared by simply mixing the ingredients. Fine solid compositions are made by blending and, usually, grinding as in a hammer or fluid energy mill. Suspensions are prepared by wet milling (see, for example, Littler, U.S. Pat. No. 3,060,084). Granules and pellets may be made by spraying the active material upon preformed granular carriers or by agglomeration techniques. See J. E. Browning, "Agglomeration", Chemical Engineering, December 4, 1967, pp. 147ff. and "Perry's Chemical Engineer's Handbook", 4th Ed., McGraw-Hill, New York, 1963, pp. 8-59ff.

EXAMPLE 38

PAC Wettable Powder

______________________________________
(1,1'-Biphenyl-4-yl)dimethyl(1H--imidazol-1-ylmethyl)-
50%
silane
sodium alkylnaphthalenesulfonate
2%
low viscosity methyl cellulose
2%
diatomaceous earth          46%
______________________________________

The ingredients are blended, coarsely hammer-milled and then air milled to produce particles of active essentially all below 10 microns in diameter. The product is reblended before packaging.

EXAMPLE 39

PAC Wettable Powder

______________________________________
(1,1-Biphenyl-4-yl)dimethyl(1H--imidazol-1-ylmethyl)-
40%
silane
dioctyl sodium sulfosuccinate
1.5%
sodium ligninsulfonate      3%
low viscosity methyl cellulose
1.5%
attapulgite                 54%
______________________________________

The ingredients are thoroughly blended, passed through an air mill, to produce an average particle size under 15 microns, reblended, and sifted through a U.S. Ser. No. 50 sieve (0.3 mm opening) before packaging.

All compounds of the invention may be formulated in the same manner.

EXAMPLE 40

PAC Emulsifiable Concentrate

______________________________________
(1,1'-Biphenyl-4-yl)dimethyl(1H--imidazol-1-ylmethyl)-
30%
silane
blend of oil soluble sulfonates
4%
and polyoxyethylene ethers
xylene                      66%
______________________________________

The ingredients are combined and stirred with gentle warming to speed solution. A fine screen filter is included in packaging operation to insure the absence of any extraneous undissolved material in the product.

EXAMPLE 41

PAC Emulsifiable Concentrate

______________________________________
(1,1'-Biphenyl-4-yl)dimethyl(1H--imidazol-1-ylmethyl)-
20%
silane
chlorobenzene               74%
sorbitan monostearate and poly-
6%
oxyethylene condensates thereof
______________________________________

The ingredients are combined and stirred to produce a solution which can be emulsified in water for application.

EXAMPLE 42

PAC Aqueous Suspension

______________________________________
(1,1'-Biphenyl-4-yl)dimethyl(1H--imidazol-1-ylmethyl)-
25%
silane
hydrated attapulgite        3%
crude calcium ligninsulfonate
10%
sodium dihydrogen phosphate 0.5%
water                       61.5%
______________________________________

The ingredients are ground together in a ball or roller mill until the solid particles have been reduced to diameters under 10 microns.

EXAMPLE 43

PAC High Strength Concentrate

______________________________________
(1,1'-Biphenyl-4-yl)dimethyl(1H--imidazol-1-ylmethyl)-
98.5%
silane
silica aerogel              0.5%
synthetic amorphous fine silica
1.0%
______________________________________

The ingredients are blended and ground in a hammer-mill to produce a high strength concentrate essentially all passing a U.S. Ser. No. 50 sieve (0.3 mm openings). This material may then be formulated in a variety of ways.

EXAMPLE 44

PAC Granule

______________________________________
wettable powder of example 39
15%
gypsum               69%
potassium sulfate    16%
______________________________________

The ingredients are blended in a rotating mixer and water sprayed on to accomplish granulation. When most of the material has reached the desired range of 1.0 to 0.42 mm. (U.S. Ser. No. 18 to 40 sieves), the granules are removed, dried, and screened. Oversize material is crushed to produce additional material in the desired range. These granules contain active ingredient.

EXAMPLE 45

PAC Dust

______________________________________
high strength concentration from
25.4%
Example 43
pyrophyllite, powdered
74.6%
______________________________________

The ingredients are thoroughly blended and packaged for use.

EXAMPLE 46

PAC Emulsifiable Concentrate

______________________________________
4-Chlorophenyl(methyl)phenyl(1H--imidazol-1-yl-
20%
methyl)silane
chlorobenzene               74%
sorbitan monostearate and poly-
6%
oxyethylene condensates thereof
______________________________________

The ingredients are combined and stirred to produce a solution which can be emulsified in water for application.

EXAMPLE 47

PAC Emulsifiable Concentrate

______________________________________
(2,4-Dichlorophenyl)dimethyl(-1H--imidazol-1-yl-
45%
methyl)silane
cyclohexanone               45%
sorbitan monostearate and poly-
10%
oxyethylene condensates thereof
______________________________________

The ingredients are combined and stirred to produce a solution which can be emulsified in water for application.

EXAMPLE 48

PAC Wettable Powder

______________________________________
bis(4-fluorophenyl)hydroxy(1H--imidazol-1-yl-
80%
methyl)silane
sodium alkylnaphthalenesulfonate
2%
sodium ligninsulfonate    2%
synthetic amorphous silica
3%
kaolinite                 13%
______________________________________

The ingredients are blended and hammer or air milled.

EXAMPLE 49

PAC Oil Suspension

______________________________________
bis(4-fluorophenyl)hydroxy(1H--imidazol-1-yl-
25%
methyl)silane
polyoxyethylene sorbitol hexaoleate
5%
highly aliphatic hydrocarbon oil
70%
______________________________________

The ingredients are ground together in a sand mill until the solid particles have been reduced to under about 5 microns. The resulting thick suspension may be applied directly, but preferably after being extended with oils or emulsified in water.

Utility

The compounds of this invention are useful as plant disease control agents. They are effective in controlling a broad spectrum of plant diseases, particularly foliar pathogens of ornamental, vegetable, field, cereal and fruit crops, such as, Puccinia recondita, Erysiphe cichoracearum, Erysiphe graminis, Venturia inaequalis, Helminthosporium maydis, Cercospora arachidicola, Uromyces phaseoli, Monilinia fructicola, Rhizoctonia solani, Pyricularia oryzae, Phytophthora infestans and other Phytophthora species. They also control seed pathogens such as Pythium aphanadermatum.

Disease control is ordinarily accomplished by applying an effective amount of the compound either pre- or post-infection to the portion of the plant to be protected, such as the roots, stems, foliage, fruit, seeds, tubers or bulbs, or to the media (soil or sand) in which the plants to be protected are growing. The compound may also be applied to the seed from which the plants to be protected are to be grown.

Rates of application for these compounds can be influenced by many factors of the environment and should be determined under actual use conditions. Foliage can normally be protected when treated at a rate of from less than 1 to 500 ppm of active ingredient. Plants growing in soil treated at a concentration from 0.1 to about 20 kg/ha can be protected from disease. Seed and seedlings can normally be protected when seed is treated at a rate of from 0.06 to about 3 grams per kilogram of seed.

The compounds of this invention can be mixed with fungicides, bactericides, acaricides, nematicides, insecticides, or other biologically active compounds in order to achieve desired results with a minimum expenditure of time, effort and material. Amounts of these biologically active materials added for each part by weight of the composition of this invention may vary from 0.05 to 25 parts by weight. Suitable agents of this type are well-known to those skilled in the art. Some are listed below:

Fungicides

methyl 2-benzimidazolecarbamate (carbendazim)

tetramethylthiuram disulfide (thiuram)

n-dodecylguanidine acetate (dodine)

manganese ethylenebisdithiocarbamate (maneb)

1,4-dichloro-2,5-dimethoxybenzene (chloroneb)

methyl 1-(butylcarbamoyl)-2-benzimidazolecarbamate (benomyl)

2-cyano-N-ethylcarbamoyl-2-methoxyiminoacetamide (cymoxanil)

N-trichloromethylthiotetrahydrophthalimide (captan)

N-trichloromethylthiophthalimide (folpet)

dimethyl(4,4'-o-phenylene)bis(3-thioallophanate) (thiophanate-methyl)

2-(thiazol-4-yl)benzimidazole (thiabendazole)

aluminum tris(O-ethyl phosphonate) (phosethyl aluminum)

tetrachloroisophthalonitrile (chlorothalonil)

2,6-dichloro-4-nitroaniline (dichloran)

N-(2,6-dimethylphenyl)-N-(methoxyacetyl)alanine methyl ester (metalaxyl)

cis-N-[(1,1,2,2-tetrachloroethyl)thio]-4-cyclohexene-1,2-dicarbioximide (captafol)

3-(3,5-dichlorophenyl)-N-(1-methyl-ethyl)-2,4-dioxo-1-imidazolidine carboxamide (iprodione)

3-(3,5-dichlorophenyl)-5-ethenyl-5-methyl-2,4-oxazolidinedione (vinclozolin)

kasugamycin

O-ethyl S,S-diphenyl phosphorodithioate (edifenphos)

Bactericides

tribasic copper sulfate

streptomycin sulfate

oxytetracycline

Acaricides

senecioic acid, ester with 2-sec-butyl-4,6-dinitrophenol (binapacryl)

6-methyl-1,3-dithiolo[2,3-B]quinonolin-2-one (oxythioquinox)

2,2,2-trichloro-1,1-bis(4-chlorophenyl)ethanol (dicofol)

bis(pentachloro-2,4-cyclopentadien-1-yl) (dienochlor)

tricyclohexyltin hydroxide (cyhexatin)

hexakis(2-methyl-2-phenylpropyl)distannoxane (fenbutin oxide)

Nematicides

2-[diethoxyphosphinylimino]-1,3-dithietane (fosthietan)

S-methyl-1-(dimethylcarbamoyl)-N-(methylcarbamoyloxy)thioformimidate (oxamyl)

S-methyl-1-carbamoyl-N-(methylcarbamoyloxy)thioformidate

N-isopropylphosphoramidic acid, O-ethyl-O'-[4-(methylthio)-m-tolyl]diester (fenamiphos)

Insecticides

3-hydroxy-N-methylcrotonamide(dimethylphosphate)ester (monocrotophos)

methylcarbamic acid, ester with 2,3-dihydro-2,2-dimethyl-7-benzofuranol (carbofuran)

O-[2,4,5-trichloro-α-(chloromethyl)benzyl]phosphoric acid, O',O'-dimethyl ester (tetrachlorvinphos)

2-mercaptosuccinic acid, diethyl ester, S-ester with thionophosphoric acid, dimethyl ester (malathion)

phosphorothioic acid, O,O-dimethyl, O-p-nitrophenyl ester (methyl parathion)

methylcarbamic acid, ester with α-naphthol (carbaryl)

methyl N-[[(methylamino)carbonyl]oxy]ethanimidothioate (methomyl)

N'-(4-chloro-o-tolyl)-N,N-dimethylformamidine (chlordimeform)

O,O-diethyl-O-(2-isopropyl-4-methyl-6-pyrimidyl)phosphorothioate (diazinon)

octachlorocamphene (toxaphene)

O-ethyl O-p-nitrophenyl phenylphosphonothioate (EPN)

cyano(3-phenoxyphenyl)-methyl 4-chloro-α-(1-methylethyl)benzeneacetate (fenvalerate)

(3-phenoxyphenyl)methyl (+)-cis,trans-3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropanecarboxylate (permethrin)

dimethyl N,N'-[thiobis](N-methylimino)carbonyloxy]]bis[ethanimidothioate] (thiodicarb)

phosphorothiolothionic acid, O-ethyl-O-[4-(methylthio)phenyl]-S-n-propyl ester (sulprofos)

α-cyano-3-phenoxybenzyl 3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropane carboxylate (cypermethrin)

cyano(3-phenoxyphenyl)methyl 4-(difluoromethoxy)-α-(methylethyl)benzeneacetate (flucythrinate)

O,O-diethyl-O-(3,5,6-trichloro-2-pyridyl)phosphorothioate (chlorpyrifos)

O,O-dimethyl-S-[(4-oxo-1,2,3-benzotriazin-3-(4H)-yl)methyl]phosphorodithioa te (azinphos-methyl)

5,6-dimethyl-2-dimethylamino-4-pyrimidinyl dimethyl carbamate (pirimicarb)

S-(N-formyl-N-methylcarbamoylmethyl-O,O-dimethyl phosphorodithioate (formothion)

S-2-(ethylthioethyl)-O,O-dimethyl phosphiorothioate (demeton-S-methyl)

α-cyano-3-phenoxybenzyl cis-3-(2,2-dibromovinyl)-2,2-dimethylcyclopropane carboxylate (deltamethrin)

cyano(3-phenoxyphenyl)methyl ester of N-(2-chloro-4-trifluoromethylphenyl)alanine (fluvalinate)

This invention is further illustrated by the following examples.

EXAMPLE 50

Compounds of this invention were dissolved in acetone in an amount equal to 6% of the final volume and then suspended at a concentration of 100 ppm in purified water containing 250 ppm of the surfactant TREM 014 (polyhydric alcohol esters). This suspension was sprayed to the point of run-off on wheat seedlings. The following day, the plants were inoculated with a spore suspension of Puccinia recondita var. tritici, causal agent of wheat leaf rust, and incubated in a saturated humidity chamber at 20° for 24 hours and then in a growth room for an additional 7 days, when disease ratings were made. Percent disease control is shown in the following table. Treated plants from successful treatments had few or no rust pustules while the untreated plants had numerous rust pustules on each leaf.

TABLE 1
______________________________________
% Control
Compound                Wheat Leaf Rust
______________________________________
(1H--Imidazol-1-ylmethyl)dimethyl-
0
(4-methylphenyl)silane
(4-Bromophenyl)(1H--imidazol-1-yl-
0
methyl)dimethylsilane
(1,1'-Biphenyl-4-yl)dimethyl(1H--
100
imidazol-1-ylmethyl)silane
(4-Chlorophenyl)(1H--imidazol-1-
50
ylmethyl)dimethylsilane
Butyl(4-chlorophenyl)(1H--imidazol-
90
1-ylmethyl)methylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
0
(1-naphthalenyl)silane
(3,4-Dichlorophenyl)(1H--imidazol-
0
1-ylmethyl)dimethylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
60
(4-phenoxyphenyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
60
4-methoxyphenyl)silane
(2,4-Dichlorophenyl)dimethyl(1H--
90
imidazol-1-ylmethyl)silane
bis(4-Chlorophenyl)(1H--imidazol-1-
0
ylmethyl)methylsilane
bis(4-Fluorophenyl)(1H--imidazol-1-
100
ylmethyl)methylsilane
Dimethyl(4-fluorophenyl)(1H--imida-
80
zol-1-ylmethyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
(4-methylthiophenyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
100A
(4-trifluoromethylphenyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
(3-trifluoromethylphenyl)silane
[4-(1,1-Dimethylethyl)phenyl](1H--
0
imidazol-1-ylmethyl)dimethylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
0
(2-trifluoromethylphenyl)silane
Butyl(2,4-dichlorophenyl)(1H--imida-
100
zol-1-ylmethyl)methylsilane
bis(2,4-Dichlorophenyl)(1H--imidazol-
100
1-ylmethyl)methylsilane
2,4-Dichlorophenyl(1H--imidazol-1-
90
ylmethyl)methyl(phenyl)silane
4-Chlorophenyl(1H--imidazol-1-yl-
100
methyl)methyl(phenyl)silane
4-Fluorophenyl(1H--imidazol-1-yl-
0
methyl)methyl(phenyl)silane
(1H--Imidazol-1-ylmethyl)(2-methoxy-
0
phenyl)dimethylsilane
(2,3-Dimethoxyphenyl)(1H--imidazol-
0
1-ylmethyl)dimethylsilane
(2,6-Dimethoxyphenyl)dimethyl(1H--
0
imidazol-1-ylmethyl)silane
Dodecyl dimethyl)(1H--imidazol-1-
80A
ylmethyl)silane
2-Chlorophenyl(1H--imidazol-1-yl-
0
methyl)dimethylsilane
[4-(4-Chlorophenoxy)phenyl]dimethyl-
90
(1H--imidazol-1-ylmethyl)silane
(1,1'-Biphenyl-4-yl)butyl(1H--imida-
100
zol-1-ylmethyl)methylsilane
Butyl(4-fluorophenyl)(1H--imidazol-
0
1-ylmethyl)methylsilane
bis(1,1'-Biphenyl-4-yl)(1H--imi-
0
dazol-1-ylmethyl)methylsilane
(1,1'-Biphenyl-4-yl)(1H--imidazol-
100
1-ylmethyl)methyl(phenyl)silane
(1,1-Dimethylethoxy)(1H--imidazol-1-
0
ylmethyl)methyl(phenyl)silane
(1H--Imidazol-1-ylmethyl)methyl-
0
(phenyl)(2-propoxy)silane
(1H--Imidazol-1-ylmethyl)[bis(4-
0
methoxyphenyl)]methylsilane
(1,1'-Biphenyl-2-yl)dimethyl(1H--
0
imidazol-1-ylmethyl)silane
(1,1'-Biphenyl-3-yl)dimethyl(1H--
90
imidazol-1-ylmethyl)silane
(2-Chlorophenyl)(1H--imidazol-1-yl-
0
methyl)methyl(phenyl)silane
(4-Bromophenyl)(1H--imidazol-1-yl-
90
methyl)methyl(phenyl)silane
[bis(2-Chlorophenyl)](1H--imidazol-
0
1-ylmethyl)methylsilane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
(4-methylsulfonylphenyl)silane
Cyclohexyl(dimethyl(1H-- imidazol-1-
0
ylmethyl)silane
[bis(4-Bromophenyl)](1H--imidazol-1-
0
ylmethyl)methylsilane
(1,1'-Biphenyl-4-yl)dimethyl(1H--
100
imidazol-1-ylmethyl)silane, 1:1
complex with cuprous chloride
(2-Chlorophenyl)(4-chlorophenyl)(1H--
100
imidazol-1-ylmethyl)methylsilane
(1H--Imidazol-1-ylmethyl)phenyl-
0
[bis(2-propoxy)]silane
tris(4-Chlorophenyl)(1H--p165pbis(4-Fluorophenyl)hydroxy(1H--imidazol-1-yl
-                       0
methyl)silane
tris(4-Fluorophenyl)(1H--imidazol-1-yl-
80
methyl)silane
bis(4-Fluorophenyl)hydroxy(lH--imidazol-
100
1-ylmethyl)silane
bis(4-Chlorophenyl)hydroxy(1H--imidazol-
80
1-ylmethyl)silane
(3-Chlorophenyl)dimethyl(1H--imidazol-1-
80
ylmethyl)silane
(1,1'-Biphenyl-4-yl)(4-fluorophenyl)-
80
(1H--imidazol-1-ylmethyl)methylsilane
Dimethyl(1H--imidazol-1-ylmethyl)(4-
100
trifluoromethoxyphenyl)silane
(4'-Bromo-1,1'-biphenyl-4-yl)dimethyl-
100
(1H--imidazol-1-ylmethyl)silane
(3,5-Dichlorophenyl)dimethyl(1H--
0
imidazol-1-ylmethyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
octadecylsilane
bis(4-Fluorophenyl)methyl[1-(1H--
0
imidazol-1-yl)ethyl]silane
______________________________________
A Compound applied at a concentration of 400 ppm.

EXAMPLE 51

Compounds of the previous examples were again dissolved in acetone in an amount equal to 6% of the final volume and then suspended at a concentration of 100 ppm in purified water containing 250 ppm of the surfactant TREM 014 (polyhydric alcohol esters). This suspension was sprayed to the point of run-off on cucumber seedlings. The following day, the plants were inoculated with a spore suspension of the fungus Erysiphe cichoracearum, causal agent of cucumber powdery mildew, and incubated in a growth room for 7 days. Disease ratings were then made. Percent disease control is shown in the following table. Treated plants from successful treatments had little or no powdery mildew in contrast to untreated plants which were covered with powdery mildew. Phytotoxicity in the form of growth reduction or hormonal effects was observed in some plants in association with disease control.

TABLE 2
______________________________________
%
Control Cucumber
Compound               Powdery Mildew
______________________________________
(1H--Imidazol-1-ylmethyl)dimethyl-
100GA
(4-methylphenyl)silane
(4-Bromophenyl)(1H--imidazol-1-yl-
100
methyl)dimethylsilane
(1,1'-Biphenyl-4-yl)dimethyl(1H--
100
imidazol-1-ylmethyl)silane
(4-Chlorophenyl)(1H--imidazol-1-
100
ylmethyl)dimethylsilane
Butyl(4-chlorophenyl)(1H--imidazol-
100G
1-ylmethyl)methylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
100
(1-naphthalenyl)silane
(3,4-Dichlorophenyl)(1H--imidazol-
100
1-ylmethyl)dimethylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
100
(4-phenoxyphenyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
100
(4-methoxyphenyl)silane
(2,4-Dichlorophenyl)dimethyl(1H--
100HB
imidazol-1-ylmethyl)silane
bis(4-Chlorophenyl)(1H--imidazol-1-
100
ylmethyl)methylsilane
bis(4-Fluorophenyl)(1H--imidazol-1-
100
ylmethyl)methylsilane
Dimethyl(4-fluorophenyl)(1H--imida-
100G
zol-1-ylmethyl)silane
Dimethyl(1H-- imidazol-1-ylmethyl)-
100
(4-methylthiophenyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
100
(4-trifluoromethylphenyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
80
(3-trifluoromethylphenyl)silane
[4-(1,1-Dimethylethyl)phenyl] (1H--
80
imidazol-1-ylmethyl)dimethylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
100G
(2-trifluoromethylphenyl)silane
Butyl(2,4-dichlorophenyl)(1H--imida-
100G
zol-1-ylmethyl)methylsilane
bis(2,4-Dichlorophenyl)(1H--imidazol-
100
1-ylmethyl)methylsilane
(2,4-Dichlorophenyl)(1H--imidazol-1-
100
ylmethyl)methyl(phenyl)silane
(4-Chlorophenyl)(1H--imidazol-1-yl-
100
methyl)methyl(phenyl)silane
(4-Fluorophenyl)(1H--imidazol-1-yl-
100
methyl)methyl(phenyl)silane
(1H--Imidazol-1-ylmethyl)(2-methoxy-
100G
phenyl)dimethylsilane
(2,3-Dimethoxyphenyl)(1H--imidazol-
100
1-ylmethyl)dimethylsilane
(2,6-Dimethoxyphenyl)(dimethyl)(1H--
0
imidazol-1-ylmethyl)silane
Dodecyl(dimethyl)(1H--imidazol-1-
55
ylmethyl)silane
(2-Chlorophenyl)(1H--imidazol-1-yl-
100
methyl)dimethylsilane
[4-(4-Chlorophenoxy)phenyl]dimethyl-
100
(1H--imidazol-1-ylmethyl)silane
(1,1'-Biphenyl-4-yl)butyl(1H--imida-
100
zol-1-ylmethyl)methylsilane
Butyl(4-fluorophenyl)(1H--imidazol-
100
1-ylmethyl)methylsilane
bis(1,1'-Biphenyl-4-yl)(1H--imi-
0
dazol-1-ylmethyl)methylsilane
1,1'-Biphenyl-4-yl)(1H--imidazol-
100
1-ylmethyl)methyl(phenyl)silane
(1,1-Dimethylethoxy)(1H--imidazol-1-
100
ylmethyl)methyl(phenyl)silane
(1H--Imidazol-1-ylmethyl)methyl-
90
(phenyl)(2-propoxy)silane
(1H--Imidazol-1-ylmethyl)[bis(4-
50
methoxyphenyl)]methylsilane
1,1'-Biphenyl-2-yl)dimethyl(1H--
50
imidazol-1-ylmethyl)silane
(1,1'-Biphenyl-3-yl)dimethyl(1H--
0
imidazol-1-ylmethyl)silane
(2-Chlorophenyl)(1H--imidazol-1-yl-
100
methyl)methyl(phenyl)silane
(4-Bromophenyl)(1H--imidazol-1-yl-
100
methyl)methyl(phenyl)silane
[bis(2-Chlorophenyl)](1H--imidazol-
100
1-ylmethyl)methylsilane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
(4-methylsulfonylphenyl)silane
Cyclohexyl(dimethyl(1H--imidazol-1-
100G
ylmethyl)silane
[bis(4-Bromophenyl)](1H--imidazol-1-
100
ylmethyl)methylsilane
(1,1'-Biphenyl-4-yl)dimethyl(1H--
100
imidazol-1-ylmethyl)silane, 1:1
complex with cuprous chloride
(2-Chlorophenyl)(4-chlorophenyl)(1H--
100
imidazol-1-ylmethyl)methylsilane
(1H--Imidazol-1-ylmethyl)phenyl-
0
[bis(2-propoxy)]silane
tris(4-Chlorophenyl)(1H--imidazol-1-yl-
100
methyl)silane
tris 4-Fluorophenyl)(1H--imidazol-1-yl-
100
methyl)silane
bis(4-Fluorophenyl)hydroxy(1H--imidazol-
100
1-ylmethyl)silane
bis(4-Chlorophenyl)hydroxy(1H--imidazol-
100
1-ylmethyl)silane
(3-Chlorophenyl)dimethyl(1H--imidazol-1-
80
ylmethyl)silane
(1,1'-Biphenyl-4-yl)(4-fluorophenyl)-
100
(1H--imidazol-1-ylmethyl)methylsilane
Dimethyl(1H--imidazol-1-ylmethyl)(4-
100G
trifluoromethoxyphenyl)silane
(4'-Bromo-1,1'-biphenyl-4-yl)dimethyl-
100
(1H--imidazol-1-ylmethyl)silane
(3,5-Dichlorophenyl)dimethyl(1H--
100G
imidazol-1-ylmethyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
octadecylsilane
bis(4-Fluorophenyl)methyl[1-(1H--
100
imidazol-1-yl)ethyl]silane
______________________________________
A G = growth reduction; and
B H = hormonal effects.

EXAMPLE 52

Several compounds of the previous examples were again dissolved in acetone in an amount equal to 6% of the final volume and then suspended at a concentration of 100 ppm in purified water containing 250 ppm of the surfactant TREM 014 (polyhydric alcohol esters). This suspension was sprayed to the point of run-off on barley seedlings. The following day, the plants were inoculated with a spore suspension of the fungus Erysiphe graminis, causal agent of barley powdery mildew, and incubated in a growth room for 7 days. Disease ratings were then made. Percent disease control is shown in the following table. Treated plants had little or no powdery mildew in contrast to untreated plants which were covered with powdery mildew.

TABLE 3
______________________________________
% Control Barley
Compound              Powdery Mildew
______________________________________
Butyl(4-Chlorophenyl)(1H--imidazol-
100
1-ylmethyl)methylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
0
(1-naphthalenyl)silane
(3,4-Dichlorophenyl)(1H--imidazol-
80
1-ylmethyl)dimethylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
0
(4-phenoxyphenyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
100
(4-methoxyphenyl)silane
(2,4-Dichlorophenyl dimethyl(1H--
100
imidazol-1-ylmethyl)silane
bis(4-Chlorophenyl)(1H--imidazol-1-
100
ylmethyl)methylsilane
Dimethy1(1H--imidazol-1-ylmethyl)-
100
(4-trifluoromethylphenyl)silane
Dodecyl(dimethyl)(1H--imidazol-1-
100A
ylmethyl)silane
______________________________________
A Compound applied at a connection of 200 ppm.

EXAMPLE 53

Compounds of this invention were dissolved in acetone in an amount equal to 6% of the final volume and then suspended at a concentration of 100 ppm in purified water containing 250 ppm of the surfactant TREM 014 (polyhydric alcohol esters). This suspension was sprayed to the point of run-off on apple seedlings. The following day, the plants were inoculated with a spore suspension of the fungus Venturia inaequalis, causal agent of apple scab, and incubated in a saturated humidity chamber at 20° for 24 hours and then in a growth room for an additional 10-12 days. Disease ratings were then made and recorded as shown in the following table. Treated plants from successful treatments had few or no apple scab lesions when compared to untreated plants which were covered with scab lesions. Phytotoxicity expressed as burning was observed in association with disease control for some treated plants.

TABLE 4
______________________________________
%
Compound               Control Apple Scab
______________________________________
(1H--Imidazol-1-ylmethyl dimethyl-
0
(4-methylphenyl)silane
(4-Bromophenyl)(1H--imidazol-1-yl-
0
methyl)dimethylsilane
(1,1'-Biphenyl-4-yl)dimethyl(1H--
80
imidazol-1-ylmethyl)silane
(4-Chlorophenyl)(1H--imidazol-1-
0
ylmethyl)dimethylsilane
Butyl(4-chlorophenyl)(1H--imidazol-
90
1-ylmethyl)methylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
40
(1-naphthalenyl)silane
3,4-Dichlozophenyl)(1H--imidazol-
80
1-ylmethyl)dimethylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
100
(4-phenoxyphenyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
4-methoxyphenyl)silane
(2,4-Dichlorophenyl)dimethyl(1H--
100
imidazol-1-ylmethyl)silane
bis(4-Chlorophenyl)(1H--imidazol-1-
0
ylmethyl)methylsilane
bis(4-Fluorophenyl)(1H--imidazol-1-
100
ylmethyl)methylsilane
Dimethyl(4-fluorophenyl)(1H--imida-
0
zol-1-ylmethyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
(4-methylthiophenyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
60B
(4-trifluoromethylphenyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
(3-trifluoromethylphenyl)silane
[4-(1,1-Dimethylethyl)phenyl](1H--
50
imidazol-1-ylmethyl)dimethylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
0
2-trifluoromethylphenyl)silane
Butyl(2,4-dichlorophenyl)(1H--imida-
100BA
zol-1-ylmethyl)methylsilane
bis(2,4-Dichlorophenyl)(1H--imidazol-
40
1-ylmethyl)methylsilane
(2,4-Dichlorophenyl)(1H--imidazol-1-
80
ylmethyl)methyl(phenyl)silane
(4-Chlorophenyl)(1H--imidazol-1-yl-
100
methyl)methyl(phenyl)silane
(4-Fluorophenyl)(1H--imidazol-1-yl-
100
methyl)methyl(phenyl)silane
(1H--Imidazol-1-ylmethyl)(2-methoxy-
60
phenyl)dimethylsilane
(2,3-Dimethoxyphenyl)(1H--imidazol-
0
1-ylmethyl)dimethylsilane
(2,6-Dimethoxyphenyl)(dimethyl)(1H--
0
imidazol-1-ylmethyl)silane
Dodecyl(dimethyl)(1H--imidazol-1-
0BA
ylmethyl)silane
(2-Chlorophenyl)(1H--imidazol-1-yl-
90
methyl)dimethylsilane
[4-(4-Chlorophenoxy)phenyl]dimethyl-
0
(1H--imidazol-1-ylmethyl)silane
(1,1'-Biphenyl-4-yl)butyl(1H--imida-
100
zol-1-ylmethyl)methylsilane
Butyl(4-fluorophenyl)(1H--imidazol-
80
1-ylmethyl)methylsilane
bis(1,1'-Biphenyl-4-yl)(1H--imi-
50
dazol-1-ylmethyl)methylsilane
(1,1'-Biphenyl-4-yl)(1H--imidazol-
0
1-ylmethyl)methyl(phenyl)silane
(1,1-Dimethylethoxy)(1H--imidazol-1-
0
ylmethyl)methyl(phenyl)silane
(1H--Imidazol-1-ylmethyl)methyl-
0
(phenyl)(2-propoxy)silane
(1H--Imidazol-1-ylmethyl)[bis(4-
50
methoxyphenyl)]methylsilane
(1,1'-Biphenyl-2-yl)dimethyl(1H--
90
imidazol-1-ylmethyl)silane
(1,1'-Biphenyl-3-yl)dimethyl(1H--
90
imidazol-1-ylmethyl)silane
(2-Chlorophenyl)(1H--imidazol-1-yl-
100
methyl)methyl(phenyl)silane
(4-Bromophenyl)(1H--imidazol-1-yl-
30
methyl)methyl(phenyl)silane
[bis(2-Chlorophenyl)](1H--imidazol-
60
1-ylmethyl)methylsilane
Dimethyl(1H--imidazol-1-ylmethyl)-
80
(4-methylsulfonylphenyl)silane
Cyclohexyl(dimethyl(1H--imidazol-1-
100BA
ylmethyl)silane
[bis(4-Bromophenyl)](1H--imidazol-1-
50
ylmethyl)methylsilane
(1,1'-Biphenyl-4-yl)dimethyl(1H--
100
imidazol-1-ylmethyl)silane, 1:1
complex with cuprous chloride
(2-Chlorophenyl)(4-chlorophenyl)(1H--
80
imidazol-1-ylmethyl)methylsilane
(1H--Imidazol-1-ylmethyl)phenyl-
70
[bis(2-propoxy)]silane
tris(4-Chlorophenyl)(1H--imidazol-1-yl-
0
methyl)silane
tris(4-Fluorophenyl)(1H--imidazol-1-yl-
0
methyl)silane
bis(4-Fluorophenyl)hydroxy(1H--imidazol-
0
1-ylmethyl)silane
bis(4-Chlorophenyl)hydroxy(1H--imidazol-
0
1-ylmethyl)silane
(3-Chlorophenyl)dimethyl(1H--imidazol-1-
60
ylmethyl)silane
(1,1'-Biphenyl-4-yl)(4-fluorophenyl)(1H--
50
imidazol-1-y1methyl)methylsilane
Dimethyl(1H--imidazol-1-ylmethyl)(4-
50
trifluoromethoxyphenyl)silane
(4'-Bromo-1,1'-biphenyl-4-yl)dimethyl-
50
(1H--imidazol-1-ylmethyl)silane
(3,5-Dichlorophenyl)dimethyl(1H--
50
imidazol-1-ylmethyl silane
Dimethyl 1H--imidazol-1-ylmethyl)-
80
octadecylsilane
bis(4-Fluorophenyl)methyl[1-(1H--
100
imidazol-1-yl)ethyl]silane
______________________________________
A B = Phytotoxic burn.
B Compound applied at a concentration of 400 ppm.

EXAMPLE 54

Compounds of the previous example were again dissolved in acetone in an amount equal to 6% of the final volume and then suspended at a concentration of 100 ppm in purified water containing 250 ppm of the surfactant TREM 014 (polyhydric alcohol esters). This suspension was sprayed to the point of run-off on corn seedlings. The following day, the plants were inoculated with a spore suspension of Helminthosporium maydis, causal agent of southern corn leaf blight, and incubated in a saturated humidity chamber at 20° for 24 hours and then in a growth room for an additional 7 days, when disease ratings were made. Percent disease control is shown in the following table. Treated plants from successful treatments had few lesions while the untreated plants had numerous lesions on each leaf.

TABLE 5
______________________________________
%
Control of Southern
Compound               Corn Leaf Blight
______________________________________
(1H--Imidazol-1-ylmethyl)dimethyl-
0
(4-methylphenyl)silane
(4-Bromophenyl)(1H--imidazol-1-yl-
0
methyl)dimethylsilane
(1,1'-Biphenyl-4-yl dimethyl(1H--
90
imidazol-1-ylmethyl)silane
(4-Chlorophenyl)(1H--imidazol-1-
0
ylmethyl)dimethylsilane
Butyl(4-chlorophenyl)(1H--imidazol-
50
1-ylmethyl)methylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
0
(1-naphthalenyl)silane
(3,4-Dichlorophenyl)(1H--imidazol-
70
ylmethyl)dimethylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
0
(4-phenoxyphenyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
(4-methoxyphenyl)silane
(2,4-Dichlorophenyl)dimethyl(1H--
70
imidazol-1-ylmethyl)silane
bis(4-Chlorophenyl)(1H--imidazol-1-
60
ylmethyl)methylsilane
bis(4-Fluorophenyl)(1H--imidazol-1-
60
ylmethyl)methylsilane
Dimethyl(4-fluorophenyl)(1H--imida-
0
zol-1-ylmethyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
4-methylthiophenyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
(3-trifluoromethylphenyl)silane
[4-(1,1-Dimethylethyl)phenyl](1H--
70
imidazol-1-ylmethyl)dimethylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
90
(2-trifluoromethylphenyl)silane
Butyl(2,4-dichlorophenyl)(1H--imida-
80
zol-1-ylmethyl)methylsilane
bis(2,4-Dichlorophenyl)(1H--imidazol-
80
1-ylmethyl)methylsilane
(2,4-Dichlorophenyl)(1H--imidazol-1-
0
ylmethyl)methyl(phenyl)silane
(4-Chlorophenyl)(1H--imidazol-1-yl-
0
methyl)methyl(phenyl)silane
(4-Fluorophenyl)(1H--imidazol-1-yl-
80
methyl)methyl(phenyl)silane
(1H--Imidazol-1-ylmethyl)(2-methoxy-
0
phenyl)dimethylsilane
(2,3-Dimethoxyphenyl)(1H--imidazol-
0
1-ylmethyl)dimethylsilane
Dodecyl(dimethyl)(1H--imidazol-1-
0
ylmethyl)silane
(2,6-Dimethoxyphenyl)(dimethyl)(1H--
50
imidazol-1-ylmethyl)silane
(2-Chlorophenyl)(1H--imidazol-1-yl-
0
methyl)dimethylsilane
[4-(4-Chlorophenoxy)phenyl]dimethyl-
0
(1H--imidazol-1-ylmethyl)silane
(1,1'-Biphenyl-4-yl)butyl(1H--imida-
0
zol-1-ylmethyl)methylsilane
Butyl(4-fluorophenyl)(1H--imidazol-
0
1-ylmethyl)methylsilane
bis(1,1'-Biphenyl-4-yl)(1H--imi-
0
dazol-1-ylmethyl)methylsilane
(1,1'-Biphenyl-4-yl)(1H--imidazol-
80
1-ylmethyl)methyl(phenyl)silane
(1,1-Dimethylethoxy)(1H--imidazol-1-
0
ylmethyl)methyl(phenyl)silane
(1H--Imidazol-1-ylmethyl)methyl-
0
(phenyl)(2-propoxy)silane
(1H--Imidazol-1-ylmethyl)[bis(4-
0
methoxyphenyl)]methylsilane
(1,1'-Biphenyl-2-yl)dimethyl(1H--
0
imidazol-1-ylmethyl)silane
(1,1'-Biphenyl-3-yl)dimethyl(1H--
90
imidazol-1-ylmethyl)silane
(2-Chlorophenyl)(1H--imidazol-1-yl-
0
methyl)methyl(phenyl)silane
(4-Bromophenyl)(1H--imidazol-1-yl-
0
methyl)methyl(phenyl)silane
[bis(2-Chlorophenyl)](1H--imidazol-
90
1-ylmethyl)methylsilane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
(4-methylsulfonylphenyl)silane
Cyclohexyl(dimethyl(1H--imidazol-1-
50
ylmethyl)silane
[bis(4-Bromophenyl)](1H--imidazol-1-
0
ylmethyl)methylsilane
(1,1'-Biphenyl-4-yl)dimethyl(1H--
0
imidazol-1-ylmethyl)silane, 1:1
complex with cuprous chloride
(2-Chlorophenyl)(4-chlorophenyl)(1H--
0
imidazol-1-ylmethyl)methylsilane
(1H--Imidazol-1-ylmethyl)phenyl-
0
[bis(2-propoxy)]silane
tris(4-Chlorophenyl)(1H--imidazol-1-yl-
0
methyl)silane
tris(4-Fluorophenyl)(1H--imidazol-1-yl-
0
methyl)silane
bis(4-Fluorophenyl)hydroxy(1H--imidazol-
0
1-ylmethyl)silane
bis(4-Chlorophenyl)hydroxy(1H--imidazol-
0
1-ylmethyl)silane
(3-Chlorophenyl)dimethyl(1H--imidazol-1-
0
ylmethyl)silane
(1,1'-Biphenyl-4-yl)(4-fluorophenyl)-
70
(1H--imidazol-1-ylmethyl)methylsilane
Dimethyl(1H--imidazol-1-ylmethyl)(4-
0
trifluoromethoxyphenyl)silane
(4'-Bromo-1,1'-biphenyl-4-yl)dimethyl-
0
(1H--imidazol-1-ylmethyl)silane
(3,5-Dichlorophenyl)dimethyl(1H--
0
imidazol-1-ylmethyl silane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
octadecylsilane
______________________________________

EXAMPLE 55

Compounds of the previous examples were again dissolved in acetone in an amount equal to 6% of the final volume and then suspended at a concentration of 100 ppm in purified water containing 250 ppm of the surfactant TREM 014 (polyhydric alcohol esters). This suspension was sprayed to the point of run-off on peanut seedlings. The following day, the plants were inoculated with a spore suspension of Cercospora arachidicola, causal agent of peanut early leafspot, and incubated in a saturated humidity chamber at 27° for 24 hours and then in a growth room for an additional 14 days, when disease ratings were made. The results are shown in the following table. Treated plants from successful treatments had few or no leafspots while the untreated plants had numerous leafspots on each leaf. Phytotoxicity expressed as burn was observed in association with disease control for some treated plants.

TABLE 6
______________________________________
% Control Peanut
Compound                Early Leafspot
______________________________________
(1H--Imidazol-1-ylmethyl)dimethyl-
0
(4-methylphenyl)silane
(4-Bromophenyl)(1H--imidazol-1-yl-
0
methyl)dimethylsilane
(1,1'-Biphenyl-4-yl)dimethyl(1H--
100
imidazol-1-ylmethyl)silane
(4-Chlorophenyl)(1H--imidazol-1-
0
ylmethyl)dimethylsilane
Butyl(4-chlorophenyl)(1H--imidazol-
0
1-ylmethyl)methylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
0
(1-naphthalenyl)silane
(3,4-Dichlorophenyl)(1H--imidazol-
0
1-ylmethyl)dimethylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
0
(4-phenoxyphenyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
(4-methoxyphenyl)silane
(2,4-Dichlorophenyl)dimethyl(1H--
100
imidazol-1-ylmethyl)silane
bis(4-Chlorophenyl)(1H--imidazol-1-
0
ylmethyl)methylsilane
bis(4-Fluorophenyl)(1H--imidazol-1-
100
ylmethyl)methylsilane
Dimethyl(4-fluorophenyl)(1H--imida-
60BA
zol-1-ylmethyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
(4-methylthiophenyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
36B
(4-trifluoromethylphenyl)silane
Dimethyl(1H--imidazol-1-ylmethyl
50
(3-trifluoromethylphenyl)silane
[4-(1,1-Dimethylethyl)phenyl](1H--
0
imidazol-1-ylmethyl)dimethylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
0
(2-trifluoromethylphenyl)silane
Butyl(2,4-dichlorophenyl)(1H--imida-
100
zol-1-ylmethyl)methylsilane
bis(2,4-Dichlorophenyl)(1H--imidazol-
90
1-ylmethyl)methylsilane
(2,4-Dichlorophenyl)(1H--imidazol-1-
100
ylmethyl)methyl(phenyl)silane
(4-Chloropheny1)(1H--imidazol-1-yl-
100
methyl)methyl(phenyl)silane
(4-Fluorophenyl)(1H--imidazol-1-yl-
100
methyl)methyl(phenyl)silane
(1H--Imidazol-1-ylmethyl)(2-methoxy-
0
phenyl)dimethylsilane
(2,3-Dimethoxyphenyl)(1H--imidazol-
0
1-ylmethyl)dimethylsilane
(2,6-Dimethoxyphenyl)(dimethyl)(1H--
0
imidazol-1-ylmethyl)silane
(2-Chlorophenyl)(1H--imidazol-1-yl-
80
methyl)dimethylsilane
[4-(4-Chlorophenoxy)phenyl] dimethyl-
0
(1H--imidazol-1-ylmethyl)silane
(1,1'-Biphenyl-4-yl)butyl(1H--imida-
90
zol-1-ylmethyl)methylsilane
Butyl(4-fluorophenyl)(1H--imidazol-
0
1-ylmethyl)methylsilane
bis(1,1'-Biphenyl-4-yl)(1H--imi-
60
dazol-1-ylmethyl)methylsilane
(1,1'-Biphenyl-4-yl)(1H--imida-
80
zol-1-ylmethyl)methyl(phenyl)-
silane
(1,1-Dimethylethoxy)(1H--imidazol-1-
0
ylmethyl)methyl(phenyl)silane
(1H--Imidazol-1-ylmethyl)methyl-
0
(phenyl)(2-propoxy)silane
(1H--Imidazol-1-ylmethyl)[bis(4-
0
methoxyphenyl)]methylsilane
(1,1'-Biphenyl-2-yl)dimethyl(1H--
30
imidazol-1-ylmethyl)silane
(1,1'-Biphenyl-3-yl)dimethyl(1H--
80
imidazol-1-ylmethyl)silane
(2-Chlorophenyl)(1H--imidazol-1-yl-
100
methyl)methyl(phenyl)silane
(4-Bromophenyl)(1H--imidazol-1-yl-
90
methyl)methyl(phenyl)silane
[bis(2-Chlorophenyl)](1H--imidazol-
100
1-ylmethyl)methylsilane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
(4-methylsulfonylphenyl)silane
Cyclohexyl(dimethyl(1H--imidazol-1-
0
ylmethyl)silane
[bis(4-Bromophenyl)](1H--imidazol-1-
50
ylmethyl)methylsilane
(1,1'-Biphenyl-4-yl)dimethyl(1H--
100
imidazol-1-ylmethyl)silane, 1:1
complex with cuprous chloride
(2-Chlorophenyl)(4-chlorophenyl)(1H--
80
imidazol-1-ylmethyl)methylsilane
(1H--Imidazol-1-ylmethyl)phenyl-
0
[bis(2-propoxy)]silane
tris(4-Chlorophenyl)(1H--imidazol-1-yl-
0
methyl)silane
tris(4-Fluorophenyl)(1H--imidazol-1-yl-
0
methyl)silane
bis(4-Fluorophenyl)hydroxy(1H--imidazol-
50
1-ylmethyl)silane
bis(4-Chlorophenyl)hydroxy(1H--imidazol-
50
1-ylmethyl)silane
(3-Chlorophenyl)dimethyl(1H--imidazol-1-
0
ylmethyl)silane
(1,1'-Biphenyl-4-yl)(4-fluorophenyl)(1H--
100
imidazol-1-ylmethyl)methylsilane
Dimethyl(1H--imidazol-1-ylmethyl)(4-
90
trifluoromethoxyphenyl)silane
(4'-Bromo-1,1'-biphenyl-4-yl)dimethyl-
90
(1H--imidazol-1-ylmethyl)silane
(3,5-Dichlorophenyl)dimethyl(1H--
0
imidazol-1-ylmethyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
octadecylsilane
bis(4-Fluorophenyl)methyl[1-(1H--
0
imidazol-1-yl)ethyl]silane
______________________________________
A B = Phytotoxic burn.
B Compound applied at a concentration of 400 ppm.

EXAMPLE 56

Compounds of the previous examples were again dissolved in acetone in an amount equal to 6% of the final volume and then suspended at a concentration of 20 ppm in purified water containing 250 ppm of the surfactant TREM 014 (polyhydric alcohol esters). This suspension was sprayed to the point of run-off on bean seedlings. The following day, the plants were inoculated with a spore suspension of the fungus Uromyces phaseoli, causal agent of bean rust, and incubated in a saturated humidity chamber at 20° for 24 hours and then in a greenhouse for 7 days. Disease ratings were then made. Percent disease control is shown in the following table. Treated plants from successful treatments had few or no rust pustules in contrast to untreated plants which were covered with rust pustules.

TABLE 7
______________________________________
% Control
Compound              Bean Rust
______________________________________
(1,1'-Biphenyl-4-yl)dimethyl(1H--
100
imidazol-1-ylmethyl)silane
(2,4-Dichlorophenyl)dimethyl(1H--
83
imidazol-1-ylmethyl)silane
______________________________________

EXAMPLE 57

Several compounds of the previous examples were again dissolved in acetone in an amount equal to 5% of the final volume and then suspended at a concentration of 100 ppm in purified water containing 700 ppm of the surfactant TREM 014 (polyhydric alcohol esters). Canned peach halves were dipped in this suspension for three minutes and then placed to air dry in sterile containers. Upon drying, the peach halves were inoculated with two pieces of Monilinia fructicola, causal agent of stone fruit brown rot, mycelium and then incubated in the sterile containers for five days. At that time the radii of the colonies' growth were measured on each peach. Colonies on treated peaches did not grow or grew only a few milliliters in diameter while those growing on untreated peaches covered the entire surface of the peach. Percent disease contol (percent growth inhibition of colonies on treated peaches as compared to that of colonies on untreated peaches) is expressed in the table below.

TABLE 8
______________________________________
% Control
Compound               Brown Rot
______________________________________
(1,1'-Biphenyl-4-yl)dimethyl(1H--
83
imidazol-1-ylmethyl)silane
Butyl(4-chlorophenyl)(1H--imidazol-
45
1-ylmethyl)methylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
80
(4-phenoxyphenyl)silane
(2,4-Dichlorophenyl)dimethyl(1H--
100
imidazol-1-ylmethyl)silane
(4-Chlorophenyl)(lH--imidazol-1-yl-
45
methyl)methyl(phenyl)silane
(4-Fluorophenyl)(1H--imidazol-1-yl-
65
methyl)methyl(phenyl)silane
______________________________________

EXAMPLE 58

Several compounds of the previous examples were again dissolved in acetone in an amount equal to 6% of the final volume and then suspended at a concentration of 100 ppm in purified water containing 250 ppm of the surfactant TREM 014 (polyhydric alcohol esters). This suspension was sprayed to the point of run-off on rice seedlings. The following day, the plants were inoculated with a mixture of bran and the mycelium of Rhizoctonia solani, causal agent of sheath blight of rice, and incubated in a growth room for 7 days. Disease ratings were then made. Percent disease control is shown in the following table. Treated plants from successful treatments had little sheath blight in contrast to untreated plants which were covered with sheath blight.

TABLE 9
______________________________________
% Control of
Compound               Rice Sheath Blight
______________________________________
(1H--Imidazol-1-ylmethyl)dimethyl-
0
(4-methylphenyl)silane
(4-Bromophenyl)(1H--imidazol-1-yl-
0
methyl)dimethylsilane
(1,1'-Biphenyl-4-yl)dimethyl(1H--
0
imidazol-1-ylmethyl)silane
(4-Chlorophenyl)(1H--imidazol-1-
0
ylmethyl)dimethylsilane
Butyl(4-chlorophenyl)(1H--imidazol-
0
1-ylmethyl)methylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
0
(1-naphthalenyl)silane
(3,4-Dichlorophenyl)(1H--imidazol-
0
1-ylmethyl)dimethylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
70
(4-phenoxyphenyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
(4-methoxyphenyl)silane
(2,4-Dichlorophenyl)dimethyl(1H--
0
imidazol-1-ylmethyl)silane
bis(4-Chlorophenyl)(1H--imidazol-1-
0
ylmethyl)methylsilane
bis(4-Fluorophenyl)(1H--imidazol-1-
90
ylmethyl)methylsilane
Dimethyl(4-fluorophenyl)(1H--imida-
0
zol-1-ylmethyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
(4-methylthiophenyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
(3-trifluoromethylphenyl)silane
[4-(1,1-Dimethylethyl)phenyl](1H--
0
imidazol-1-ylmethyl)dimethylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
80
(2-trifluoromethylphenyl)silane
Butyl(2,4-dichlorophenyl)(1H--imida-
90
zol-1-ylmethyl)methylsilane
bis(2,4-Dichlorophenyl)(1H--imidazol-
80
1-ylmethyl)methylsilane
(2,4-Dichlorophenyl)(1H--imidazol-1-
0
ylmethyl)methyl(phenyl)silane
(4-Chlorophenyl)(1H--imidazol-1-yl-
0
methyl)methyl(phenyl)silane
(4-Fluorophenyl)(1H--imidazol-1-yl-
90
methyl)methyl(phenyl)silane
(1H--Imidazol-1-ylmethyl)(2-methoxy-
90
phenyl)dimethylsilane
(2,3-Dimethoxyphenyl)(1H--imidazol-
0
1-ylmethyl)dimethylsilane
(2,6-Dimethoxyphenyl)(dimethyl)(1H--
0
imidazol-1-ylmethyl)silane
(2-Chlorophenyl)(1H--imidazol-1-yl-
0
methyl)dimethylsilane
[4-(4-Chlorophenoxy)phenyl]  dimethyl-
70
(1H--imidazol-1-ylmethyl)silane
(1,1'-Biphenyl-4-yl)butyl(1H--imida-
90
zol-1-ylmethyl)methylsilane
Butyl(4-fluorophenyl)(1H--imidazol-
80
1-ylmethyl)methylsilane
bis(1,1'-Biphenyl-4-yl)(1H--imi-
0
dazol-1-ylmethyl)methylsilane
(1,1'-Biphenyl-4-yl)(1H--imidazol-
0
1-ylmethyl)methyl(phenyl)silane
(1,1-Dimethylethoxy)(1H--imidazol-1-
0
ylmethyl)methyl(phenyl)silane
(1H--Imidazol-1-ylmethyl)methyl-
0
(phenyl)(2-propoxy)silane
(1H--Imidazol-1-ylmethyl)[bis(4-
0
methoxyphenyl)]methylsilane
(1,1'-Bipheny1-2-yl)dimethyl(1H--
90
imidazol-1-ylmethyl)silane
(1,1'-Biphenyl-3-yl)dimethyl(1H--
90
imidazol-1-ylmethyl)silane
(2-Chlorophenyl)(1H--imidazol-1-yl-
0
methyl)methyl(phenyl)silane
(4-Bromophenyl)(1H--imidazol-1-yl-
0
methyl)methyl(phenyl)silane
[bis(2-Chlorophenyl)](1H--imidazol-
40
1-ylmethyl)methylsilame
Dimethyl(1H--imidazol-1-ylmethyl)-
0
(4-methylsulfonylphenyl)silane
Cyclohexyl(dimethyl(1H--imidazol-1-
0
ylmethyl)silane
[bis(4-Bromophenyl)](1H--imidazol-1-
0
ylmethyl)methylsilane
(1,1'-Biphenyl-4-yl)dimethyl(1H--
50
imidazol-1-ylmethyl)silane, 1:1
complex with cuprous chloride
(2-Chlorophenyl)(4-chlorophenyl)(1H--
0
imidazol-1-ylmethyl)methylsilane
(1H--Imidazol-1-ylmethyl)phenyl-
0
[bis(2-propoxy)]silane
tris(4-Chlorophenyl)(1H--imidazol-1-yl-
0
methyl)silane
tris(4-Fluorophenyl)(1H--imidazol-1-yl-
0
methyl)silane
bis(4-Fluorophenyl hydroxy(1H--imidazol-
90
1-ylmethyl)silane
bis(4-Chlorophenyl)hydroxy(1H--imidazol-
0
1-ylmethyl)silane
(3-[Chlorophenyl)dimethyl(1H--imidazol-1-
90
ylmethyl)silane
(1,1'-Biphenyl-4-yl)(4-fluorophenyl)-
0
(1H--imidazol-1-ylmethyl)methylsilane
Dimethyl(1H--imidazol-1-ylmethyl)(4-
0
trifluoromethoxyphenyl)silane
(4'-Bromo-1,1'-biphenyl-4-yl)dimethyl-
90
(1H--imidazol-1-ylmethyl)silane
(3,5-Diehlorophenyl)dimethyl(1H--
90
imidazol-1-ylmethyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
100
octadecylsilane
bis(4-Fluorophenyl)methyl[1-(1H--
90
imidazol-1-yl)ethyl]silane
______________________________________

EXAMPLE 59

The compounds of the previous examples were again dissolved in acetone in an amount equal to 6% of the final volume and then suspended at a concentration of 100 ppm in purified water containing 250 ppm of the surfactant TREM 014 (polyhydric alcohol esters). These suspensions were sprayed to the point of run-off on rice seedlings. The following day, the plants were inoculated with a spore suspension of Pyricularia oryzae, causal agent of rice blast, and incubated in a saturated humidity chamber at 28°C for 24 hours and then in a growth room for an additional 7 days, when disease ratings were made. Percent disease control is shown in the following table. Treated plants from successful treatments had no or few lesions while the untreated plants had numerous lesions on each leaf.

TABLE 10
______________________________________
% Control of
Compound                Rice Blast
______________________________________
(1H--Imidazol-1-ylmethyl)dimethyl-
0
(4-methylphenyl)silane
(4-Bromophenyl)(1H--imidazol-1-yl-
0
methyl)dimethylsilane
(1,1'-Biphenyl-4-yl)dimethyl(1H--
0
imidazol-1-ylmethyl)silane
(4-Chlorophenyl)(1H--imidazol-1-
0
ylmethyl)dimethylsilane
Butyl(4-chlorophenyl)(1H--imidazol-
0
1-ylmethyl)methylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
0
1-naphthalenyl)silane
(3,4-Dichlorophenyl)(1H--imidazol-
0
1-ylmethyl)dimethylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
70
(4-phenoxyphenyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
(4-methoxyphenyl)silane
((2,4-Dichlorophenyl))dimethyl(1H--
0
imidazol-1-y1methyl)silane
bis(4-Chlorophenyl)(1H--imidazol-1-
0
ylmethyl)methylsilane
bis(4-Fluorophenyl)(1H--imidazol-1-
0
ylmethyl)methylsilane
Dimethyl(4-fluorophenyl)(1H--imida-
0
zol-1-ylmethyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
(4-methylthiophenyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
(3-trifluoromethylphenyl)silane
[4-(1,1-Dimethylethyl)phenyl](1H--
80
imidazol-1-ylmethyl)dimethylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
0
2-trifluoromethylphenyl)silane
Butyl(2,4-dichlorophenyl)(1H--imida-
0
zol-1-ylmethyl)methylsilane
bis((2,4-Dichlorophenyl))(1H--imidazol-
0
1-ylmethyl)methylsilane
(2,4-Dichlorophenyl)(1H--imidazol-1-
0
ylmethyl)methyl(phenyl)silane
(4-Chlorophenyl)(1H--imidazol-1-yl-
0
methyl)methyl(phenyl)silane
(4-Fluorophenyl)(1H--imidazol-1-yl-
100
methyl)methyl(phenyl)silane
(1H--Imidazol-1-ylmethyl)(2-methoxy-
0
phenyl)dimethylsilane
(2,3-Dimethoxyphenyl)(1H--imidazol-
0
1-ylmethyl)dimethylsilane
(2,6-Dimethoxyphenyl)(dimethyl)(1H--
0
imidazol-1-ylmethyl)silane
(2-Chlorophenyl)(1H--imidazol-1-yl-
0
methyl)dimethylsilane
[4-(4-Chlorophenoxy)phenyl(dimethyl-
100
(1H--imidazol-1-ylmethyl)silane
(1,1'-Biphenyl-4-yl)butyl(1H--imida-
90
zol-1-ylmethyl)methylsilane
Butyl(4-fluorophenyl)(1H--imidazol-
100
1-ylmethyl)methylsilane
bis(1,1'-Biphenyl-4-yl)(1H--imi-
0
dazol-1-ylmethyl)methylsilane
(1,1'-Biphenyl-4-yl)(1H--imidazol-
0
1-ylmethyl)methyl(phenyl)silane
1,1-Dimethylethoxy(1H--imidazol-1-
0
ylmethyl)methyl(phenyl)silame
(1H--Imidazol-1-ylmethyl)methyl-
0
(phenyl)(2-propoxy)silane
(1H--Imidazol-1-ylmethyl)[bis(4-
0
methoxyphenyl)]methylsilane
(1,1'-Biphenyl-2-yl)dimethyl(1H--
90
imidazol-1-ylmethyl)silane
(1,1'Biphenyl-3-yl)dimethyl(1H--
80
imidazol-1-ylmethyl)silane
(2-Chlorophenyl)(1H--imidazol-1-yl-
0
methyl)methyl(phenyl)silane
(4-Bromophenyl)(1H--imidazol-1-yl-
0
methyl)methyl(phenyl)silane
[bis(2-Chlorophenyl)](1H--imidazol-
90
1-ylmethyl)methylsilane
Dimethyl(1H--imidazol-1-ylmethyl)-
100
(4-methylsulfonylphenyl)silane
bis(4-Bromophenyl)](1H--imidazol-1-
80
ylmethyl)methylsilane
tris(4-Chlorophenyl)(1H--imidazol-1-yl-
0
methyl)silane
tris(4-Fluorophenyl)(1H--imidazol-1-yl-
0
methyl)silane
bis(4-Fluorophenyl)hydroxy(1H--imidazol-
60
1-ylmethyl)silane
bis(4-Chlorophenyl)hydroxy(1H--imidazol-
0
1-ylmethyl)silane
(3-Chlorophenyl)dimethyl(1H--imidazol-1-
0
ylmethyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)(4-
90
trifluoromethoxyphenyl)silane
(4'-Bromo-1,1'-biphenyl-4-yl)dimethyl-
90
(1H--imidazol-1-ylmethyl)silane
(3,5-Dichlorophenyl)dimethyl(1h--
0
imidazol-1-ylmethyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
80
octadecylsilane
bis(4-Fluorophenyl)methyl[1-(1H--
0
imidazol-1-yl)ethyl]silane
______________________________________

EXAMPLE 60

The compounds of the previous examples were again dissolved in acetone in an amount equal to 6% of the final volume and then suspended at a concentration of 100 ppm in purified water containing 250 ppm of the surfactant TREM 014 (polyhydric alcohol esters). These suspensions were sprayed to the point of run-off on tomato seedlings. The following day, the plants were inoculated with a spore suspension of Phytophthora infestans, causal agent of tomato late blight, and incubated in a saturated humidity chamber at 20°C for 24 hours and then in a growth room for an additional 7 days, when disease ratings were made. Percent disease control is shown in the following table. Treated plants from successful treatments had no or few lesions while the untreated plants had numerous lesions on each leaf.

TABLE 11
______________________________________
% Control of
Compound               Tomato Late Blight
______________________________________
(1H--Imidazol-1-ylmethyl)dimethyl-
0
(4-methylphenyl)silane
(4-Bromophenyl)(1H--imidazol-1-yl-
30
methyl)dimethylsilane
(1,1'-Biphenyl-4-yl)dimethyl(1H--
50
imidazol-1-ylmethyl)silane
(4-Chlorophenyl)(1H--imidazol-1-
0
ylmethyl)dimethylsilane
Butyl(4-chlorophenyl)(1H--imidazol-
0
1-ylmethyl)methylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
0
(1-naphthalenyl)silane
(3,4-Dichlorophenyl)(1H--imidazol-
0
1-ylmethyl)dimethylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
80
(4-phenoxyphenyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
(4-methoxyphenyl)silane
(2,4-Dichlorophenyl)dimethyl(1H--
0
imidazol-1-ylmethyl)silane
bis(4-Chlorophenyl)(1H--imidazol-1-
0
ylmethyl)methylsilane
bis(4-Fluorophenyl)(1H--imidazol-1-
0
ylmethyl)methylsilane
Dimethyl(4-fluorophenyl)(1H--imida-
0
zol-1-ylmethyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
(4-methylthiophenyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
70
(3-trifluoromethylphenyl)silane
[4-(1,1-Dimethylethyl)phenyl](1H--
0
imidazol-1-ylmethyl)dimethylsilane
(lH--Imidazol-1-ylmethyl)dimethyl-
0
(2-trifluoromethylphenyl)silane
Butyl(2,4-dichlorophenyl)(1H--imida-
0
zol-1-ylmethyl)methylsilane
bis((2,4-Dichlorophenyl))(1H--imidazol-
0
1-ylmethyl)methylsilane
(2,4-Dichlorophenyl)(1H--imidazol-1-
0
ylmethyl)methyl(phenyl)silane
(4-Chlorophenyl)(1H--imidazol-1-yl-
0
methyl)methyl(phenyl)silane
(4-Fluorophenyl)(1H--imidazol-1-yl-
0
methyl)methyl(phenyl)silane
(1H--Imidazol-1-ylmethyl)(2-methoxy-
0
phenyl)dimethylsilane
(2,3-Dimethoxyphenyl)(1H--imidazol-
0
1-ylmethyl)dimethylsilane
(2,6-Dimethoxyphenyl)(dimethyl)(1H--
50
imidazol-1-ylmethyl)silane
(2-Chlorophenyl)(1H--imidazol-1-yl-
0
methyl)dimethylsilane
[4-(4-Chlorophenoxy)phenyl]dimethyl-
0
(1H--imidazol-1-ylmethyl)silane
(1-1'-Biphenyl-4-yl)butyl(1H--imida-
0
zol-1-ylmethyl)methylsilane
Butyl(4-fluorophenyl)(1H--imidazol-
0
1-ylmethyl)methylsilane
bis(1,1'-Biphenyl-4-yl)(1H--imi-
0
dazol-1-ylmethyl)methylsilane
(1,1'-Biphenyl-4-yl)(1H--imidazol-
0
1-ylmethyl)methyl(phenyl)silane
(1,1-Dimethylethoxy)(1H--imidazol-1-
0
ylmethyl)methyl(phenyl)silane
(1H--Imidazol-1-ylmethyl)methyl-
0
(phenyl)(2-propoxy)silane
(1H--Imidazol-1-ylmethyl)[bis(4-
0
methoxyphenyl)]methylsilane
(1,1'-Biphenyl-2-yl)dimethyl(1H--
0
imidazol-1-ylmethyl)silane
(1,1'-Biphenyl-3-yl)dimethyl(1H--
0
imidazol-1-ylmethyl)silane
(2-Chlorophenyl)(1H--imidazol-1-yl-
0
methyl)methyl(phenyl)silane
(4-Bromophenyl)(1H--imidazol-1-yl-
0
methyl)methyl(phenyl)silane
[bis(2-Chlorophenyl)](1H--imidazol-
60
1-ylmethyl)methylsilane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
(4-methylsulfonylphenyl)silane
Cyclohexyl(dimethyl(1H--imidazol-1-
ylmethyl)silane
[bis(4-Bromophenyl)](1H--imidazol-1-
0
ylmethyl)methylsilane
(1,1'-Biphenyl-4-yl)dimethyl(1H--
0
imidazol-1-ylmethyl)silane, 1:1
complex with cuprous chloride
(2-Chlorophenyl)(4-chlorophenyl)(1H--
0
imidazol-1-ylmethyl)methylsilane
(1H--Imidazol-1-ylmethyl)phenyl-
0
[bis(2-propoxy)]silane
tris(4-Chlorophenyl)(1H--imidazol-1-yl-
0
methyl silane
tris(4-Fluorophenyl)(1H--imidazol-1-yl-
0
methyl)silane
bis(4-Fluorophenyl)hydroxy(1H--imidazol-
0
1-ylmethyl)silane
bis(4-Chlorophenyl)hydroxy(1H--imidazol-
0
1-ylmethyl)silane
(3-Chlorophenyl)dimethyl(1H--imidazol-1-
0
ylmethyl)silane
(1,1'-Biphenyl-4-yl)(4-Fluorophenyl)-
0
(1H--imidazol-1-ylmethyl)methylsilane
Dimethyl(1H--imidazol-1-ylmethyl)(4-
0
trifluoromethoxyphenyl)silane
(4'-Bromo-1,1'-biphenyl-4-yl)dimethyl-
0
(1H--imidazol-1-ylmethyl)silane
(3,5-Dichlorophenyl)dimethyl(1H--
0
imidazol-1-ylmethyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
octadecylsilane
bis(4-Fluorophenyl)methyl[1-(1H--
0
imidazol-1-yl)ethyl]silane
______________________________________

EXAMPLE 61

Compounds of the previous examples were incorporated into 45°C standard strength V-8 agar at a concentration of 200.0 ppm. The amended media were then dispensed into petri dishes and allowed to solidify. Plugs approximately 4 mm² from agar cultures of 5 Phytophthora species: Phytophthora cinnamoni, P. cactorum, P. infestans, P. palmivora, and P. parasitica var. nicotianae were placed on the media and incubated at 22°C for 6 days. Colonies whose radial growth extended 1 mm or less were considered to be controlled by a compound when compared to colonies whose radial growth extended 15 mm or more when growing on unamended media. The number of Phytophthora species controlled by certain compounds of this invention are listed in the table below.

TABLE 12
______________________________________
No. of
5 Phytophthora species
Compound             controlled in vitro
______________________________________
(1,1'-Biphenyl-4-yl)dimethyl(1H--
3
imidazol-1-ylmethyl)silane
(1H--Imidazol-1-ylmethyl)dimethyl-
4
(4-phenoxyphenyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
(4-methoxyphenyl)si1ane
(2,4-Dichlorophenyl)dimethyl(1H--
5
imidazol-1-ylmethyl)silane
bis(4-Fluorophenyl)(1H--imidazol-1-
0
ylmethyl)methylsilane
(4-Chlorophenyl)(1H--imidazol-1-yl-
0
methyl)methyl(phenyl)silane
(4-Fluorophenyl)(1H--imidazol-1-y1-
2
methyl)methyl(phenyl)silane
[4-(4-Chlorophenoxy)phenyl]dimethyl-
0
(1H--imidazol-1-ylmethyl)silane
______________________________________

EXAMPLE 62

Several compounds of the previous examples were incorporated into a proprietary formulation and used to coat cotton seeds at a rate of 2 gm/kg seed. After being thoroughly coated, the seeds were allowed to air dry at room temperature. The cotton seeds were then planted into soil amended with the fungus Pythium aphanadermatum, sand, and corn meal at a rate sufficient to kill most untreated seeds. The seeds were held at room temperature for 1 week, after which time disease ratings were made. Percent disease control is shown in the following table. Most or all seeds from successful treatments germinated and produced vigorous seedlings in contrast to untreated seeds which either did not germinate or produced damped off or weak seedlings.

TABLE 13
______________________________________
% Control of
Compound               Pythium on Cotton
______________________________________
(1H--Imidazol-1-ylmethyl)dimethyl-
0
(4-methylphenyl)silane
(1,1'-Biphenyl-4-yl)dimethyl(1H--
18
imidazol-1-ylmethyl)silane
(4-Chloropbenyl)(1H--imidazol-1-
18A
ylmethyl)dimethylsilane
Butyl(4-chlorophenyl)(1H--imidazol-
0
1-ylmethyl)methylsilane
(3,4-Dichlorophenyl)(1H--imidazol-
15A
1-ylmethyl)dimethylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
0
(4-phenoxyphenyl)silane
Dimethyl(4-fluorophenyl)(1H--imi-
0
dazol-1-ylmethyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
(3-trifluoromethylphenyl)silane
(2-Chlorophenyl)(1H--imidazol-1-yl-
0
methyl)dimethylsilane
(1,1'-Biphenyl-4-yl)butyl(1H--
0
imidazol-1-ylmethyl)methylsilane
Butyl(4-fluorophenyl)(1H--imidazol-
0
1-ylmethyl)methylsilane
______________________________________
A = control at a rate of 0.5 gm/kg seed.

EXAMPLE 63

Several compounds of the previous examples were incorporated into a proprietary formulation and used to coat corn seeds at a rate of 2 gm/kg seed. After being thoroughly coated, the seeds were allowed to air dry at room temperature. The seeds were then planted into soil amended with a mixture of the fungus Pythium aphanadermatum, sand, and corn meal at a rate sufficient to kill most untreated seeds. The seeds were held at 49° F. for 2 weeks and then at 70° F. for 1 additional week. After this time disease ratings were made. Percent disease control is shown in the following table. Most or all seeds from successful treatments germinated and produced vigorous seedlings in contrast to untreated seeds which either did not germinate or produced damped off or weak seedlings.

TABLE 14
______________________________________
% Control of
Compound              Pythium on Corn
______________________________________
(1H--Imidazol-1-ylmethyl)dimethyl-
30
(4-methylphenyl)silane
(1,1'-Biphenyl-4-yl)dimethyl(1H--
32
imidazol-1-ylmethyl)silane
(4-Chlorophenyl)(1H--imidazol-1-
25
ylmethyl)dimethylsilane
Butyl(4-chlorophenyl)(1H--imidazol-
0
1-ylmethyl)methylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
27
(1-naphthalenyl)silane
(3,4-Dichlorophenyl)(1H--imidazol-
30
1-ylmethyl)dimethylsilane
(1H--Imidazol-1-ylmethyl)dimethyl-
5
(4-phenoxyphenyl)silane
Dimethyl(4-f1uorophenyl)(1H--imi-
15
dazol-1-ylmethyl)silane
Dimethyl(1H--imidazol-1-ylmethyl)-
0
3-trifluoromethylphenyl)silane
[4-(4-Chlorophenoxy phenyl]di-
0
methyl(1H--imidazol-1-ylmethyl)-
silane
(1,1'-Biphenyl-4-yl)butyl(1H--
0
imidazol-1-ylmethyl)methylsilane
Butyl(4-fluorophenyl)(1H--imidazol-
0
1-ylmethyl)methylsilane
______________________________________

Claims

1. A compound of the formula: ##STR76## wherein Q₁, Q₂ and Q₃ are independently H or CH₃ ;

R₁ is naphthyl, or ##STR77## where R₄ and R₅ are independently --H, halogen, --OCH₃, --OCF₃, --SCH₃, --SO₂ CH₃, --CF₃, phenyl, phenyl substituted with halogen and/or C₁ -C₄ alkyl and/or --CF₃, phenoxy or phenoxy substituted with halogen and/or C₁ -C₄ alkyl and/or --CF₃ ;

with the proviso that both R₄ and R₅ may not simultaneously be H; and

R₂ and R₃ are independently C₁ -C₆ alkyl, C₃ -C₆ cycloalkyl, OR₆, or ##STR78## wherein R₄ and R₅ are as defined above except that R₄ and R₅ may simultaneously be H; and

where R₆ is H, C₁ -C₄ alkyl, or ##STR79## with the proviso that when R₂ and R₃ are both OR₆, then R₆ must be C₁ -C₄ alkyl; or

R₂ and R₃ together may be a 1,2- or 1,3- or 1,4-glycol bridge or a 1,4 unsaturated glycol bridge substituted by up to four alkyl groups R₇ -R₁0 that have a total of up to four carbon atoms ##STR80## R₁1 is H or C₁ -C₄ alkyl; and fungicidally active metal complexes or protic acid salts of said compounds.

2. compounds of claim 1 wherein Q₁ =Q₂ =Q₃ =H; and wherein R₁1 is H or CH₃.

3. compounds of claim 2 wherein:

R₁ is ##STR81## and R₂ is C₁ -C₄ alkyl or ##STR82## and R₃ is C₁ -C₄ alkyl or OR₆, where R₆ is H, C₁ -C₄ alkyl or ##STR83##

4. compounds of claim 3 wherein: ##STR84## where R₄ is at the para position of R₁, and R₄ is H, F, Cl, Br, or phenyl; and

R₅ is H, F, Cl, or Br; and

R₂ is ##STR85## or C₁ -C₄ alkyl; and R₃ is C₁ -C₄ alkyl or OR₆, where R₆ is H, C₁ -C₄ alkyl or ##STR86##

5. The compound of claim 1 which is (1,1'-biphenyl-4-yl)dimethyl(1H-imidazol-1-ylmethyl)silane.

6. The compound of claim 1 which is (2,4-dichlorophenyl)dimethyl(1H-imidazol-1-ylmethyl)silane.

7. A composition suitable for controlling fungus disease which comprises an effective amount of a compound of claim 1 and at least one of the following: surfactant, solid or liquid inert diluent.

8. A composition suitable for controlling fungus disease which comprises an effective amount of a compound of claim 2 and at least one of the following: surfactant, solid or liquid inert diluent.

9. A composition suitable for controlling fungus disease which comprises an effective amount of a compound of claim 3 and at least one of the following: surfactant, solid or liquid inert diluent.

10. A composition suitable for controlling fungus disease which comprises an effective amount of a compound of claim 4 and at least one of the following: surfactant, solid or liquid inert diluent.

11. A composition suitable for controlling fungus disease which comprises an effective amount of the compound of claim 5 and at least one of the following: surfactant, solid or liquid inert diluent.

12. A composition suitable for controlling fungus disease which comprises an effective amount of the compound of claim 6 and at least one of the following: surfactant, solid or liquid inert diluent.

13. A method for controlling fungus disease which comprises applying to the locus of infestation to be protected an effective amount of a compound of claim 1.

14. A method for controlling fungus disease which comprises applying to the locus of infestation to be protected an effective amount of a compound of claim 2.

15. A method for controlling fungus disease which comprises applying to the lucus of infestation to be protected an effective amount of a compound of claim 3.

16. A method for controlling fungus disease which comprises applying to the locus of infestation to be protected an effective amount of a compound of claim 4.

17. A method for controlling fungus disease which comprises applying to the locus of infestation to be protected an effective amount of the compound of claim 5.

18. A method for controlling fungus disease which comprises applying to the locus of infestation to be protected an effective amount of the compound of claim 6.